Cut back not definite? (7)
I believe the answer is:
tonsure
'cut' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'back not definite?' is the wordplay.
'back' is a reversal indicator.
'definite?' becomes 'sure' (synonyms).
'not' backwards is 'ton'.
'ton'+'sure'='TONSURE'
Can you help me to learn more?
(Other definitions for tonsure that I've seen before include "Monk's haircut" , "Monastic hairstyle" , "Close-shaved hairstyle" , "Uncovered area on top" , "Shaven part of monk's head" .)