Answer: CANT
CANT is a crossword puzzle answer that we have spotted 118 times.
    - Argot
 
    - Quitter's word
 
    - Isn't able to
 
    - Defeatist's word
 
    - Pessimist's word
 
    - Jargon
 
    - Empty talk
 
    - Tilted position
 
    - Insincere talk
 
    - With 1-Across, is very important
 
    - Lingo
 
    - "Out of the question"
 
    - "I Can Dream, __ I?" (Andrews Sisters tune)
 
    - "This ___ be!"
 
    - Is unable to
 
    - Taboo word for optimists
 
    - Hypocrisy
 
    - Private language
 
    - "___ Buy Me Love"
 
    - Set at an angle
 
    - "Sheesh, ___ you read?"
 
    - "I ___ hear you!"
 
    - Underworld lingo
 
    - Tilt
 
    - Lacks the wherewithal to
 
    - Inclination
 
    - "___ or won't?
 
    - Lacks the power to
 
    - Oblique line
 
    - "White Men ___ Jump"
 
    - "You ___ fight city hall"
 
    - Lacks the means to
 
    - "__ Smile Without You": 1978 hit
 
    - "You __ be serious!"
 
    - Singsong speech
 
    - ''__ you take a hint?''
 
    - ''You __ fight City Hall''
 
    - Jargons
 
    - "Got other plans, sorry"
 
    - Is unable
 
    - Pious platitude
 
    - Unable to
 
    - Pitch to one side
 
    - Doesn't have what it takes
 
    - "You ___ be serious!"
 
    - Secret lingo
 
    - Word avoided by optimists
 
    - Hasn't the wherewithal
 
    - Slope
 
    - "You ___ handle the truth!"
 
    - "___ Smile Without You": 1978 hit
 
    - Beveled edge
 
    - "You --- Hurry Love"
 
    - Common excuse
 
    - "___ you take a hint?"
 
    - With 6 Down, isn't up to the task
 
    - "You ___ take it with you"
 
    - "I'm busy then"
 
    - Lacks the skills
 
    - Lacks the ability
 
    - Isn't 25-Across
 
    - Incline
 
    - Isn't able
 
    - Lacks the wherewithal
 
    - Lacks the skills to
 
    - 'This ___ be!'
 
    - Lacks what it takes
 
    - Word for quitters
 
    - Frankie Valli's "___ Take My Eyes Off You"
 
    - "Not doable"
 
    - Common contraction
 
    - "I'm busy that day"
 
    - Slanted surface
 
    - Isn't capable of
 
    - Slacker's word
 
    - More than won't
 
    - 'White Men ___ Jump'
 
    - "I ___ blame you"
 
    - Platitudinous talk
 
    - Lacks the capacity
 
    - "Why ___ we be friends?"
 
    - Quitter's contraction
 
    - 'It ___ be!'
 
    - "___ Buy Me Love": Beatles hit
 
    - Shop talk
 
    - "___ you read?"
 
    - Not just won't
 
    - Terse refusal
 
    - Lean
 
    - Prominent angle
 
    - Has no ability to
 
    - Projecting angle
 
    - Humbug
 
    - Hypocritical talk
 
    - Insincere language
 
    - Pious talk
 
    - Ray Charles' "I ___ Stop Loving You"
 
    - "Too busy"
 
    - "I ___ wait!"
 
    - Is incapable of
 
    - "___ relate"
 
    - Is powerless to
 
    - "I ___ even"
 
    - "I ___ take you anywhere!"
 
    - Is too busy, say
 
    - "___ win 'em all"
 
    - "I ___ explain it"
 
    - "___, or won't?"
 
    - "You ___ be serious"
 
    - Language common to a profession
 
    - "___ hurt"
 
    - Thieves' jargon
 
    - "You ___ win 'em all"
 
    - With 67- and 68-Across, MC Hammer lyric that applies to each of the answers to the starred clues
 
    - Tilt to one side
 
    - "I ___ believe my eyes!"
 
    - "Sorry, busy"
 
    - "Sorry, I ___ relate"