Old man taking in a deity in temple (6)
I believe the answer is:
pagoda
'temple' is the definition.
(pagoda is a kind of temple)
'old man taking in a deity' is the wordplay.
'old man' becomes 'pa' (both can mean father).
'taking in' is an insertion indicator.
'deity' becomes 'god' ('god' can be a synonym of 'deity'**).
'a'+'god'='agod'
'pa' enclosing 'agod' is 'PAGODA'.
'in' is the link.
(Other definitions for pagoda that I've seen before include "Temple - a GPO ad (anag)" , "Eastern temple, usually a tower" , "Hindu temple shaped like pyramid" , "Eastern tiered tower" , "Pyramidal temple with an upward curving roof" .)