Church has girl offering communion cup (7)
I believe the answer is:
chalice
'communion cup' is the definition.
(I've seen this before)
'church has girl' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'has' is a charade indicator (letters next to each other).
'girl' becomes 'alice' (**).
'ch'+'alice'='CHALICE'
'offering' is the link.
(Other definitions for chalice that I've seen before include "Wine cup used at Christian Eucharist" , "Cup used in church" , "Sacred cup for consecrated wine" , "Necessity for communion" , "Eucharistic cup" .)