Exaggerate past deeds only for starters (6)
I believe the answer is:
overdo
'exaggerate' is the definition.
('overdo' can be a synonym of 'exaggerate')
'past deeds only for starters' is the wordplay.
'past' becomes 'over' (I've seen this before).
'for starters' indicates taking the first letters.
The initial letters of 'deeds only' is 'do'.
'over'+'do'='OVERDO'
(Other definitions for overdo that I've seen before include "Cook wrongly" , "Carry too far" , "Exaggerate, go too far" , "Cook too long or act excessively" , "Perform excessively" .)