Start to place two articles over temple (8)
I believe the answer is:
pantheon
'temple' is the definition.
(pantheon is a kind of temple)
'start to place two articles over' is the wordplay.
'start to' says to take the initial letters.
'two articles' becomes 'anthe' (article meaning part of speech: the, a etc.).
'over' becomes 'on' (I've seen this in other clues**).
The first letter of 'place' is 'p'.
'p'+'anthe'+'on'='PANTHEON'
(Other definitions for pantheon that I've seen before include "Temple of all the gods in ancient Greece" , "list of great names" , "Circular temple in Rome" , "memorial" , "All the gods of a people or religion" .)