It cuts things rather fine (6)
I believe the answer is:
mincer
'it cuts things rather fine' is the definition.
The definition suggests a singular noun which matches the answer.
This is the entire clue.
Can you help me to learn more?
(Other definitions for mincer that I've seen before include "Kitchen appliance" , "chopper" , "affected walker" , "Meat grinder" , "Does one move affectedly" .)