The handsome chap said no, unfortunately (6)
I believe the answer is:
adonis
'the handsome chap' is the definition.
(I've seen this before)
'said no unfortunately' is the wordplay.
'unfortunately' indicates anagramming the letters (a bad or unfortunate spelling).
'said'+'no'='saidno'
'saidno' is an anagram of 'ADONIS'.
(Other definitions for adonis that I've seen before include "Extremely attractive young man from Greek mythology" , "dish" , "Handsome Greek loved by Aphrodite" , "Extremely handsome young man" , "Greek idol" .)