Perhaps write right verse (5)
I believe the answer is:
rhyme
'verse' is the definition.
(a rhyme is a piece of verse)
'perhaps write right' is the wordplay.
I cannot really understand how this works, but
'perhaps' could be 'y' (I've seen this in other clues) and 'y' is found in the answer.
'right' could be 'r' (common abbreviation) and 'r' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for rhyme that I've seen before include "Have the same final sound - poetry" , "'Moon' and 'June' do" , "anticipated by a nursery perhaps" , "(Of words) sound the same" , "Short poem" .)