Cat -- it's wandering around rooms (6)
I believe the answer is:
attics
'rooms' is the definition.
(attic is a type of room)
'cat it's wandering' is the wordplay.
'wandering' indicates an anagram.
'cat'+'its'='catits'
'catits' with letters rearranged gives 'ATTICS'.
'around' is the link.
(Other definitions for attics that I've seen before include "Space just below the roof" , "Static in top rooms" , "Lofts, garrets" .)