Temple a deity enters each year (6)
I believe the answer is:
pagoda
'temple' is the definition.
(pagoda is a kind of temple)
'a deity enters each year' is the wordplay.
'deity' becomes 'god' (a deity is a god or divine being).
'enters' indicates putting letters inside.
'each year' becomes 'p.a.' (synonyms).
'a'+'god'='agod'
'agod' put into 'pa' is 'PAGODA'.
(Other definitions for pagoda that I've seen before include "place of worship" , "Hindu/Buddhist temple" , "Buddhist memorial building" , "religious structure" , "Eastern building" .)