Caught, say, someone who nicks? (6)
I believe the answer is:
cutter
'someone who nicks?' is the definition.
'cutter' can be an answer for 'someone' (cutter is a kind of someone). I am unsure of the rest of the definition.
'caught say' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'say' becomes 'utter' (to utter something is to speak or say it).
'c'+'utter'='CUTTER'
Can you help me to learn more?
(Other definitions for cutter that I've seen before include "motor launch" , "Vessel (but not a clipper!)" , "Fast boat; blade" , "Small vessel" , "Knife etc - sailing ship" .)