Discontinue composing verse? (5)
I believe the answer is:
sever
'discontinue' is the definition.
(I've seen this in another clue)
'composing verse?' is the wordplay.
'composing' indicates an anagram.
'verse' is an anagram of 'SEVER'.
(Other definitions for sever that I've seen before include "Divide by cutting" , "Cut completely" , "Cut off, separate" , "Cleave" , "Disconnect" .)