Correct sound to correspond (5)
I believe the answer is:
write
'correspond' is the definition.
(writing is a kind of corresponding)
'correct sound' is the wordplay.
'correct' becomes 'right' ('right' can be a synonym of 'correct').
'sound' shows a homophone (sound like).
'right' sounds like 'WRITE'.
'to' acts as a link.
(Other definitions for write that I've seen before include "Put pen to paper" , "Compose (a text)" , "Use a pen/pencil" , "what an author must do" , "Produce text" .)