Youth has a benefit posted, reportedly (10)
I believe the answer is:
adolescent
'youth' is the definition.
(I've seen this before)
'a benefit posted reportedly' is the wordplay.
'benefit' becomes 'dole' (I've seen this before).
'posted' becomes 'sent' ('send' can be a synonym of 'post').
'reportedly' indicates a 'sounds like' (homophone) clue.
'sent' is a homophone of 'scent'.
'a'+'dole'+'scent'='ADOLESCENT'
'has' is the link.
(Other definitions for adolescent that I've seen before include "Teenage" , "Immature" , "Person in child-adult transition" , "One growing" , "Developing" .)