Penny caught bouquet (4)
I believe the answer is:
cent
'penny' is the definition.
(synonyms)
'caught bouquet' is the wordplay.
'caught' shows a homophone (sound like) (to catch something can mean to hear it).
'bouquet' becomes 'scent' (the scent of a wine).
'scent' sounds like 'CENT'.
(Other definitions for cent that I've seen before include "One hundredth of a dollar" , "Fractional monetary unit" , "One-hundreth part of a currency" , "Part of a dollar" , "Little bit of money" .)