Sun in a filming location is an advantage (5)
I believe the answer is:
asset
'an advantage' is the definition.
(I've seen this in another clue)
'sun in a filming location' is the wordplay.
'sun' becomes 'S' (abbreviation).
'in' indicates putting letters inside.
'filming location' becomes 'set' (I've seen this in another clue).
'a'+'set'='aset'
's' inserted into 'aset' is 'ASSET'.
'is' acts as a link.
(Other definitions for asset that I've seen before include "Help" , "Valued item" , "Valuable thing" , "Valuable possession, worth having" , "Item well worth having" .)