Carry out desire for senior member (5)
I believe the answer is:
doyen
'senior member' is the definition.
(I've seen this before)
'carry out desire' is the wordplay.
'carry out' becomes 'do' ('do' can be a synonym of 'carry out').
'desire' becomes 'yen' (yen is a kind of desire).
'do'+'yen'='DOYEN'
'for' is the link.
(Other definitions for doyen that I've seen before include "As senior statesman" , "Senior man of a group" , "The oldest of the members" , "Most valued prof, eg" , "The most respected among experts" .)