Answer: TMAN
TMAN is a crossword puzzle answer that we have spotted 111 times.
    - Govt. agent
 
    - Agt. such as Ness
 
    - Ness, e.g.
 
    - Revenuer
 
    - Eliot Ness, e.g.
 
    - Ness, for one
 
    - Fed
 
    - Certain Fed
 
    - Investigator, of sorts
 
    - Govt. investigator
 
    - I.R.S. worker
 
    - Counterfeiter catcher
 
    - Eliot Ness, notably
 
    - Certain fraud investigator, informally
 
    - Fed. agent in finances
 
    - Eliot Ness, for one
 
    - I.R.S. agent, e.g.
 
    - Crime-fighter Eliot Ness, notably
 
    - Tax cheat chaser, informally
 
    - Eliot Ness, notably, for short
 
    - Untouchable, e.g.
 
    - Untouchable, say
 
    - Bad bill collector?
 
    - One of the Untouchables
 
    - Tax evader's chaser
 
    - Fed of a sort
 
    - IRS employee
 
    - Fed. agent
 
    - Govt. guy
 
    - Revenuer, for short
 
    - Ness, notably
 
    - Counterfeiters' nemesis
 
    - IRS agent
 
    - Government agent, briefly
 
    - One of Ness's guys
 
    - Secret Service agent, until recently
 
    - Fed who tracks down money launderers
 
    - Tax investigator, for short
 
    - Fed under Ness
 
    - Tax law enforcer
 
    - Bur. of Prohibition employee
 
    - Revenuer, for one
 
    - Revenuer, briefly
 
    - Certain federal agent
 
    - Federal agent
 
    - Counterfeiter's foe, briefly
 
    - Money-minded fed
 
    - Counterfeiter's foe
 
    - Bootlegger's foe
 
    - Counterfeiter catcher, briefly
 
    - Counterfeiter's nemesis
 
    - Treasury agent, briefly
 
    - U.S. Treasury agent
 
    - ATF agent, once
 
    - Counterfeiter's foil
 
    - Federal agent investigating taxes, informally
 
    - One trying to eliminate bad notes
 
    - Agt. under Ness
 
    - Revenuer, e.g.
 
    - Mtge. fraud investigator
 
    - -
 
    - Ness was a notable one
 
    - Fed after Capone
 
    - Treas. Dept. rep
 
    - IRS enforcer
 
    - Bootlegger's bugbear
 
    - No friend of the bootlegger
 
    - Fed in pursuit of counterfeiters
 
    - Government agent
 
    - IRS worker
 
    - Agt. like Eliot Ness
 
    - Certain U.S. agent
 
    - I.R.S. agent, e.g., informally
 
    - Counterfeiter-catching agt.
 
    - IRS agent, casually
 
    - Agt. after tax evaders
 
    - Fed. investigator
 
    - Counterfeiter chaser
 
    - Fed concerned with forgery
 
    - Tax cheat chaser, briefly
 
    - Fraud-fighting Fed
 
    - Still destroyer
 
    - Counterfeiter fighter
 
    - Federal tax enforcer, informally
 
    - Counterfeiter fighter, informally
 
    - Laundering investigator, for short
 
    - I.R.S. agent, for short
 
    - 'Untouchable' agt.
 
    - Counterfeit watchdog, for short
 
    - Gangland enforcer
 
    - Tax fraud detector, informally
 
    - Fake bill tracer
 
    - One of the feds
 
    - Tim Geithner, formerly
 
    - Guy who worked for Ness
 
    - Fed after tax evaders
 
    - Prohibition enforcer, informally
 
    - Counterfeiter's pursuer, for short
 
    - Treasury worker
 
    - D.C. agent
 
    - Guy catching counterfeiters
 
    - Tax evader's chaser, briefly
 
    - IRS guy, for instance
 
    - Fed chasing Capone
 
    - Speakeasy investigator, informally
 
    - Catcher of counterfeiters, in old lingo
 
    - Government sleuth, quaintly
 
    - Any of Ness' agents
 
    - I.R.S. agent, quaintly
 
    - Government agent targeting counterfeiters, in dated lingo
 
    - Capone adversary, informally