Curious question is not badly put (6)
I believe the answer is:
quaint
'curious' is the definition.
(I've seen this before)
'question is not badly put' is the wordplay.
'question' becomes 'qu'.
'is not badly put' becomes 'ain't' (incorrect or informal version of 'isn't').
'qu'+'aint'='QUAINT'
(Other definitions for quaint that I've seen before include "Charmingly odd, old" , "Attractive, in an old-fashioned way" , "Attractively odd" , "Picturesque" , "Droll, whimsical" .)