Father joins deity by a temple (6)
I believe the answer is:
pagoda
'temple' is the definition.
(I know that pagoda is a type of temple)
'father joins deity by a' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'joins' is a charade indicator (letters next to each other).
'deity' becomes 'god' (a deity is a god or divine being).
'by' says to put letters next to each other.
'pa'+'god'+'a'='PAGODA'
(Other definitions for pagoda that I've seen before include "place for devotees?" , "place of worship" , "Buddhist temple, pyramid-shaped with many tiers" , "Buddhist tower with several stories" , "Oriental temple, often a tower" .)