Answer: ONTV
ONTV is a crossword puzzle answer that we have spotted 75 times.
    - Airing
 
    - Where to see "E.R." or "Ellen"
 
    - How many a product is advertised
 
    - How much advertising is done
 
    - "As advertised ___!"
 
    - "As seen ___"
 
    - Widely seen
 
    - Being broadcast
 
    - Running, in a way
 
    - Being telecast
 
    - Airing, in a way
 
    - Like an Olympics broadcast, say
 
    - Starring in a sitcom, say
 
    - Starring in a sitcom, e.g.
 
    - Where some actors are seen
 
    - Where to find "Hope & Faith"
 
    - Being broadcast via idiot box
 
    - Broadcast
 
    - Being seen via the small screen
 
    - Where to see "Meerkat Manor"
 
    - Where to see stars
 
    - Being aired, as a sitcom
 
    - Airing in prime time, say
 
    - Being shown, in a way
 
    - Airing, as an ESPN game
 
    - Like news anchors, when working
 
    - Being aired
 
    - Where to see 60-Across
 
    - Aired
 
    - In prime time, e.g.
 
    - Where to get ''Lost''?
 
    - Alternate title for the puzzle
 
    - Where to find 21 Across
 
    - ''... but I play one ___''
 
    - Appearing in a sitcom
 
    - One place to view the Super Bowl
 
    - Where the Nelsons were seen
 
    - Airing, as a sitcom
 
    - "... but I play one ___"
 
    - Where to get "Lost"?
 
    - Shown
 
    - Like anchors
 
    - Via the tube
 
    - Where to see stars?
 
    - Acting in a sitcom, e.g.
 
    - 'As seen ___'
 
    - Seen by millions
 
    - Where to find "Criminal Minds"
 
    - "But I play one ___"
 
    - Where reruns run
 
    - Playing
 
    - Airing, as a golf tournament
 
    - Watchable, in a way
 
    - "As seen ___": ad phrase
 
    - Airing, as a miniseries
 
    - Showing via the idiot box
 
    - Being aired, in a way
 
    - Streaming in the living room
 
    - Currently playing
 
    - Where many ads are seen
 
    - Like games at a sports bar
 
    - Streamed, perhaps
 
    - Where "Star Trek" and "Mission: Impossible" originated
 
    - Where to see Samantha Bee
 
    - Where to catch "Deadliest Catch"
 
    - Gracing the small screen
 
    - Streamable, say
 
    - Airing via the small screen
 
    - Currently airing
 
    - Being transmitted via small screen
 
    - Being broadcast, perhaps
 
    - Where to watch "Jeopardy!"
 
    - See 31-Across
 
    - Being broadcast via small screen
 
    - Broadcasting