Fellow spun round endlessly (5)
I believe the answer is:
eddie
'fellow' is the definition.
(man's name)
'spun round endlessly' is the wordplay.
'spun round' becomes 'eddied' (eddy can mean to swirl or spin).
'endlessly' means to remove the last letter.
'eddied' with its final letter taken off is 'EDDIE'.
(Other definitions for eddie that I've seen before include "Man" , "- Cochran, US singer" , "Boy" , "-- Izzard, comedian" , "-- Grundy (The Archers)" .)