Church girl finds sacred vessel (7)
I believe the answer is:
chalice
'sacred vessel' is the definition.
'chalice' can be an answer for 'vessel' (thesaurus). I am not sure about the 'sacred' bit.
'church girl' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'girl' becomes 'alice' (girl's name).
'ch'+'alice'='CHALICE'
'finds' acts as a link.
Can you help me to learn more?
(Other definitions for chalice that I've seen before include "cup used in company with host" , "bowl" , "Church wine cup" , "Necessity for communion" , "Large goblet for consecrated wine" .)