Crooked quiz waltzes out of bounds (7)
I believe the answer is:
askance
'crooked' is the definition.
(thesaurus)
'quiz waltzes out of bounds' is the wordplay.
'quiz' becomes 'ask' (quiz can mean to ask a question).
'waltzes' becomes 'dances' (I've seen this before).
'out of bounds' means to look at the middle letters (the bounds or edges of the word are removed).
The central letters of 'dances' are 'ance'.
'ask'+'ance'='ASKANCE'
(Other definitions for askance that I've seen before include "In suspicious manner" , "Look like this to show suspicion" , "Look thus to convey disapproval or distrust" , "Look this way in doubt or suspicion" , "A look like this is sidelong or suspicious" .)