Set of bells in collar, moving (8)
I believe the answer is:
carillon
'set of bells' is the definition.
(I've seen this before)
'in collar moving' is the wordplay.
'moving' indicates an anagram (letters are moved around).
'in'+'collar'='incollar'
'incollar' with letters rearranged gives 'CARILLON'.
(Other definitions for carillon that I've seen before include "Chime of bells" , "Mechanical bells" , "Stop" , "Set of musical bells" , "Tune played from bell-tower" .)