The most common and most likely answer to this crossword clue is the 5 plus 4 letter word GREEN ROOM
I've seen this crossword clue in The Guardian
G
R
E
E
N
R
O
O
M
More clues leading to the result GREEN ROOM
- Putting on this jumper, male player might relax here
- Never to return wearing dress in theatrical space for visitors
- Where rest of ham never returned during wedding party?
- No thanks to Garbo, Monroe wandering in space backstage
- Apparently envious over opportunity that’s provided for rest of players
- . Recycling area in the theatre?
- Note Nero fiddled in the midst of Rome on fire, and lobby for non-performers?
Buddy explains!
The straight part
We know that "space backstage" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case space backstage = green room.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.