Point out emperor's a god (4)
I believe the answer is:
eros
'a god' is the definition.
(Eros is an example)
'point out emperor's' is the wordplay.
'point' becomes 'n' (N is an example).
'out' is a deletion indicator.
'emperor's' becomes 'neros' (Roman emperor).
'neros' with 'n' removed is 'EROS'.
(Other definitions for eros that I've seen before include "Arrow-shooting god" , "Sore about love god" , "Greek equivalent to Roman Cupid" , "Deity" , "Orbiter" .)