Tiara moved around lobbies (5)
I believe the answer is:
atria
'lobbies' is the definition.
(plural of atrium, type of hall or lobby)
'tiara moved' is the wordplay.
'moved' indicates an anagram.
'tiara' is an anagram of 'ATRIA'.
'around' acts as a link.
(Other definitions for atria that I've seen before include "Lobbies" , "Central courtyards" , "Apartments" , "Parts of the heart or of Roman houses" , "Public spaces with galleries" .)