Temple walk perhaps in flat area (6)
I believe the answer is:
pagoda
'temple' is the definition.
(pagoda is a kind of temple)
'walk perhaps in flat area' is the wordplay.
'walk perhaps' becomes 'go' (walking is a kind of going).
'in' means one lot of letters goes inside another.
'flat' becomes 'pad' (person's home).
'area' becomes 'a' (maths abbreviation).
'go' put into 'pad' is 'pagod'.
'pagod'+'a'='PAGODA'
(Other definitions for pagoda that I've seen before include "Sacred many-tiered temple" , "Pyramid-shaped Asian temple" , "place for devotees?" , "Hindu temple shaped like pyramid" , "Buddhist tower with several stories" .)