Soft bed for an actor (6)
I believe the answer is:
player
'an actor' is the definition.
('player' can be a synonym of 'actor')
'soft bed' is the wordplay.
'soft' becomes 'p' (musical abbreviation for 'piano'**).
'bed' becomes 'layer' (I've seen this before).
'p'+'layer'='PLAYER'
'for' acts as a link.
(Other definitions for player that I've seen before include "Gamer or sportsman" , "South African golfer, Gary" , "Batsman perhaps" , "Gambler" , "one on the wing, perhaps?" .)