Senior member of a party given money (5)
I believe the answer is:
doyen
'senior member' is the definition.
(a senior or respected figure)
'a party given money' is the wordplay.
'a party' becomes 'do' (do is a kind of party).
'given' says to put letters next to each other.
'money' becomes 'yen' (Japanese currency).
'do'+'yen'='DOYEN'
'of' is the link.
(Other definitions for doyen that I've seen before include "Dean of an academy" , "Senior man of a group" , "Prominent group member" , "Top expert in a field" , "Most prominent expert" .)