Actors having a fling? (4)
I believe the answer is:
cast
I believe this clue is a double definition.
'actors' is the first definition.
(group of actors)
'a fling?' is the second definition.
(I've seen this in another clue)
'having' acts as a link.
(Other definitions for cast that I've seen before include "Allot roles in a play" , "'Send forth, a spell perhaps (4)'" , "Thrown" , "Throw out line for fish" , "Throw - actors - shape something - burrowing worm's sand" .)