Father and deity are opening temple (6)
I believe the answer is:
pagoda
'temple' is the definition.
(I know that pagoda is a type of temple)
'father and deity are opening' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'and' says to put letters next to each other.
'deity' becomes 'god' (a deity is a god or divine being).
'opening' suggests taking the first letters.
The first letter of 'are' is 'a'.
'pa'+'god'+'a'='PAGODA'
(Other definitions for pagoda that I've seen before include "Hindu temple shaped like pyramid" , "Hindu or Buddhist temple" , "Eastern temple, usually a tower" , "Buddhist temple, pyramid-shaped with many tiers" , "Pyramid-shaped Hindu temple" .)