Actors off from “Robinson Crusoe”? (8)
I believe the answer is:
castaway
'robinson crusoe?' is the definition.
(I've seen this before)
'actors off' is the wordplay.
'actors' becomes 'cast' (group of actors).
'off' becomes 'away' (synonyms).
'cast'+'away'='CASTAWAY'
'from' is the link.
(Other definitions for castaway that I've seen before include "Desert island resident" , "Victim of shipwreck" , "One abandoned eg from ship" , "just one left on the Strand?" , "worthless" .)