Theatre backdrop packed up in crates, e.g. at storerooms (5,3)
I believe the answer is:
stage set
'theatre backdrop' is the definition.
'stage set' can be an answer for 'backdrop' (I have seen 'dramatic backdrop' mean 'stage set' so perhaps 'backdrop' could also mean 'stage set'). I'm unsure of the 'theatre' bit.
'packed up in crates e g at storerooms' is the wordplay.
'STAGE SET' is hidden backwards within the letters.
However, I am unsure how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for stage set that I've seen before include "Scenery and furniture" , "dramatic backdrop" , "play ready to start" , "Theatre scenery etc" .)