Girl’s after church goblet (7)
I believe the answer is:
chalice
'goblet' is the definition.
(synonyms)
'girl's after church' is the wordplay.
'girl' becomes 'alice' (girl's name).
'after' says to put letters next to each other.
'church' becomes 'ch' (common abbreviation).
'alice' put after 'ch' is 'CHALICE'.
(Other definitions for chalice that I've seen before include "Large goblet for consecrated wine" , "bowl" , "Necessity for communion" , "Church wine cup" , "Eucharistic cup" .)