To do so will brighten the room, whichever way you look at it (7)
I believe the answer is:
repaper
'whichever way you look at it' is the definition.
'to do so will brighten the room' is the wordplay.
I cannot quite understand how this works, but
'do' could be 'ape' (both can mean to impersonate) and 'ape' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for repaper that I've seen before include "Decorate walls again" , "Cover walls again" , "Apply new wall covering" , "Decorate again (palindrome)" , "renew wall-covering" .)