Temple walk perhaps in flat area (6)
I believe the answer is:
'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'.
(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" .)