Environmental space for actors (5,4)
I believe the answer is:
green room
'actors' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'environmental space' is the wordplay.
'environmental' becomes 'green'.
'space' becomes 'room' (enough space or room to do something).
'green'+'room'='GREEN-ROOM'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for green room that I've seen before include "Place for actors to relax" , "backstage area" , "Here's the rest of the cast" , "Where actors can relax in the theatre" , "Part of theatre" .)