Colour scheme inside corner room (5)
I believe the answer is:
decor
'colour scheme' is the definition.
(I've seen this before)
'inside corner room' is the wordplay.
'DECOR' is hidden in amongst the letters.
However, I'm not sure how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for decor that I've seen before include "Choice of colour" , "ornament" , "Scheme of interior furnishings" , "stage background" , "Credo (anag.)" .)