Handsome youth (6)
I believe the answer is:
adonis
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">handsome youth</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for adonis that I've seen before include "Handsome Greek loved by Aphrodite" , "Said no to the Greek youth" , "dandy" , "handsome lad" , "male looker" .)