Celestial being (5)
'celestial being' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for angel that I've seen before include "Spiritual being - financial backer" , "Word linking cake and fish" , "Sponsor" , "Glean (anag.)" , "on the Tube?" .)
(Other definitions for archangel that I've seen before include "The head celestial messenger" , "Senior heavenly messenger or Russian port" , "Port in northern Russia, or senior heavenly messenger" , "Among others, Michael" , "Most important of divine messengers" .)