Red couch I 'antiqued' to some extent (7)
I believe the answer is:
chianti
'red' is the definition.
(I've seen this before)
'couch i antiqued to some extent' is the wordplay.
'to some extent' says the answer is hidden in the clue.
'CHIANTI' is hidden within 'couch i antiqued'.
(Other definitions for chianti that I've seen before include "I can hit (anag) - alcoholic drink" , "Italian offering" , "European wine" , "Wine produced in Tuscany" , "Italian wine variety" .)