Fellow offers some amusing entertainment (4)
I believe the answer is:
gent
'fellow' is the definition.
(I've seen this before)
'some amusing entertainment' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'GENT' can be found hidden inside 'amusing entertainment'.
'offers' is the link.
(Other definitions for gent that I've seen before include "Refined man (colloquial)" , "Informal and short man" , "Man of good standing (informal)" , "bloke" , "Toff" .)