Chuck's after a girl, being very attractive (5)
I believe the answer is:
dishy
'very attractive' is the definition.
(I've seen this before)
'chuck's after a girl' is the wordplay.
'chuck' becomes 'shy' (both can mean to throw).
'after' is a charade indicator (letters next to each other).
'a girl' becomes 'di' (short for Diane or Diana).
'shy' after 'di' is 'DISHY'.
'being' is the link.
(Other definitions for dishy that I've seen before include "Informally good-looking, like plate?" , "Good-looking (colloq.)" , "Gorgeous" , "Handsome" , "Attractive" .)