Loving a party circle (7)
I believe the answer is:
adoring
'loving' is the definition.
(I've seen this before)
'a party circle' is the wordplay.
'party' becomes 'do' (do is a kind of party).
'circle' becomes 'ring' ('ring' can be a synonym of 'circle').
'a'+'do'+'ring'='ADORING'
(Other definitions for adoring that I've seen before include "Passionate" , "Showing great affection" , "Worshipping the loved one" , "Greatly loving" , "Worshipping; admiring" .)