Sound sense in quote (4)
I believe the answer is:
cite
'quote' is the definition.
(synonyms)
'sound sense' is the wordplay.
'sound' shows a homophone (sound like).
'sense' becomes 'sight' (sighting is a kind of sensing).
'sight' sounds like 'CITE'.
'in' acts as a link.
(Other definitions for cite that I've seen before include "Quote as authority" , "Use quotations" , "Summon - quote" , "Make reference to" , "Mention as example or quote" .)