Right grate moved around loft (6)
I believe the answer is:
garret
'loft' is the definition.
(I know this)
'right grate moved around' is the wordplay.
'right' becomes 'r' (common abbreviation).
'moved' indicates an anagram.
'around' means one lot of letters goes inside another.
'grate' is an anagram of 'garet'.
'r' going within 'garet' is 'GARRET'.
(Other definitions for garret that I've seen before include "Small top-floor room" , "Room on the top floor of a house" , "Attic, home of struggling artist?" , "'Attic, loft (6)'" , "Upper room" .)