Money quietly given to party (4)
I believe the answer is:
dosh
'money' is the definition.
(I've seen this before)
'quietly given to party' is the wordplay.
'quietly' becomes 'sh'.
'given to' says to put letters next to each other.
'party' becomes 'do' (do is a kind of party).
'sh' after 'do' is 'DOSH'.
(Other definitions for dosh that I've seen before include "Money (slang)" , "currency" , "Ready" , "Moolah (slang)" , "Shod (anag.)" .)