Room in which cleaner accepts award (7)
I believe the answer is:
chamber
'room' is the definition.
(chamber is a kind of room)
'cleaner accepts award' is the wordplay.
'cleaner' becomes 'char' (charwoman is a type of cleaner).
'accepts' is an insertion indicator.
'award' becomes 'mbe'.
'char' going around 'mbe' is 'CHAMBER'.
'in which' acts as a link.
(Other definitions for chamber that I've seen before include "Enclosed cavity, part of gun" , "Bedroom" , "Room - part of a legislature" , "posh room" , "A house of parliament" .)