Make space for retreat at a temple (6)
I believe the answer is:
pagoda
'temple' is the definition.
(I know that pagoda is a type of temple)
'make space for retreat at a' is the wordplay.
'make' becomes 'do' (do can mean to make or prepare).
'space' becomes 'gap' (gap is a kind of space).
'for retreat' shows that the letters should be reversed in order (retreat can mean to go back).
'at' is a charade indicator (letters next to each other).
'do'+'gap'='dogap'
'dogap' written backwards gives 'pagod'.
'pagod'+'a'='PAGODA'
(Other definitions for pagoda that I've seen before include "Eastern building" , "Buddhist temple, pyramid-shaped with many tiers" , "Sacred many-tiered temple" , "Asian temple with up-turned eaves" , "A buddhist temple built in tiers" .)