Loving having a party telephone (7)
I believe the answer is:
adoring
'loving' is the definition.
(I've seen this before)
'a party telephone' is the wordplay.
'party' becomes 'do' (do is a kind of party).
'telephone' becomes 'ring' ('ring' can be a synonym of 'telephone').
'a'+'do'+'ring'='ADORING'
'having' acts as a link.
(Other definitions for adoring that I've seen before include "Being very fond of" , "Giving great love" , "Worshipping; admiring" , "Worshipping the loved one" , "Extravagantly indulgent" .)