A party helping worship (9)
I believe the answer is:
adoration
'worship' is the definition.
(adoration can mean worship or devotion)
'a party helping' is the wordplay.
'party' becomes 'do' (do can informally mean a party).
'helping' becomes 'ration' (a ration is a serving or helping).
'a'+'do'+'ration'='ADORATION'
(Other definitions for adoration that I've seen before include "high esteem" , "Hero-worship" , "Worship, veneration" , "Deep love and respect" , "Not a radio (anag.)" .)