A function to share love? (9)
I believe the answer is:
adoration
'love?' is the definition.
(I've seen this before)
'a function to share' is the wordplay.
'function' becomes 'do' (I've seen this in other clues).
'to share' becomes 'ration' (ration is a kind of share).
'a'+'do'+'ration'='ADORATION'
(Other definitions for adoration that I've seen before include "What star gets from fans" , "high esteem" , "praise" , "Not a radio (anag.)" , "holding someone up a lot" .)