The attendant rushed endlessly around (5)
I believe the answer is:
usher
'the attendant' is the definition.
(usher is a kind of attendant)
'rushed endlessly around' is the wordplay.
'endlessly' means to remove the last letter.
'around' indicates anagramming the letters.
'rushed' with its last letter removed is 'rushe'.
'rushe' with letters rearranged gives 'USHER'.
(Other definitions for usher that I've seen before include "falling house" , "Minor court official" , "Doorkeeper in parliament or 29 down" , "Cinema or wedding attendant" , "'The Fall of the House of -----', Edgar Allan Poe" .)