Chap is no angler, unfortunately (8)
I believe the answer is:
algernon
'chap' is the definition.
'no angler unfortunately' is the wordplay.
'unfortunately' indicates anagramming the letters.
'no'+'angler'='noangler'
'noangler' with letters rearranged gives 'ALGERNON'.
'is' is the link.
(Other definitions for algernon that I've seen before include "-- Swinburne, English poet" , "Noel rang (anag) - boy's name" , "Man's name" , "Nag loner (anag) ___ boy's name" , "- - Moncrieff (Wilde)" .)