Boy reportedly checked for hit on the head (7)
I believe the answer is:
brained
'hit on the head' is the definition.
(brain can mean to hit on the head)
'boy reportedly checked' is the wordplay.
'boy' becomes 'b' (abbreviation used in schools).
'reportedly' shows a homophone (sound like).
'checked' becomes 'reined' (to rein something in is to control or check it).
'reined' sounds like 'rained'.
'b'+'rained'='BRAINED'
'for' is the link.
(Other definitions for brained that I've seen before include "Whacked on the head" , "Slugged" .)