Loud duck with spirit in marketplace (5)
I believe the answer is:
forum
'marketplace' is the definition.
(forum is a kind of marketplace)
'loud duck with spirit' is the wordplay.
'loud' becomes 'f' (A musical term).
'duck' becomes 'o'.
'with' is a charade indicator (letters next to each other).
'spirit' becomes 'rum' (I've seen this before).
'f'+'o'+'rum'='FORUM'
'in' is the link.
(Other definitions for forum that I've seen before include "Ancient Roman marketplace or place for public discussions" , "A meeting to exchange views" , "Public meeting or assembly for open discussion" , "Place to discuss ideas" , "Tribunal" .)