Cut a prison term (4)
I believe the answer is:
nick
'cut' is the definition.
(I know that nick is a type of cut)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for nick that I've seen before include "Slight cut" , "diabolical person's name" , "Clink" , "Prison - steal" , "Lift" .)