Girl after church finds goblet (7)
I believe the answer is:
chalice
'goblet' is the definition.
(synonyms)
'girl after church' is the wordplay.
'girl' becomes 'alice' (girl's name).
'after' means one lot of letters go next to another.
'church' becomes 'ch' (common abbreviation).
'alice' after 'ch' is 'CHALICE'.
'finds' is the link.
(Other definitions for chalice that I've seen before include "Wine cup used at Christian Eucharist" , "Church vessel" , "Communion cup" , "Large goblet for consecrated wine" , "Sacred cup for consecrated wine" .)