Shy, for actors (4)
I believe the answer is:
cast
I believe this is a double definition.
'shy' is the first definition.
(I've seen this before)
'actors' is the second definition.
(I've seen this before)
'for' is the link.
(Other definitions for cast that I've seen before include "Squint to see" , "Throw - actors - shape something - burrowing worm's sand" , "Set of performers" , "Players < lose" , "'Send forth, a spell perhaps (4)'" .)