For temple, travel through flat area (6)
I believe the answer is:
pagoda
'for temple' is the definition.
(pagoda is a kind of temple)
'travel through flat area' is the wordplay.
'travel' becomes 'go' (synonyms).
'through' indicates putting letters inside (inserted letters go through the word).
'flat' becomes 'pad' (a person's home).
'area' becomes 'a' (maths abbreviation).
'go' going within 'pad' is 'pagod'.
'pagod'+'a'='PAGODA'
(Other definitions for pagoda that I've seen before include "Pyramid-shaped Asian temple" , "temple? Quite the opposite" , "Hindu temple shaped like pyramid" , "Oriental temple, often a tower" , "place of worship" .)