For every boy is individual (6)
I believe the answer is:
person
'is individual' is the definition.
(an individual person)
'for every boy' is the wordplay.
'for every' becomes 'per' ('per' means 'for each' or 'for every').
'boy' becomes 'son' (male child).
'per'+'son'='PERSON'
(Other definitions for person that I've seen before include "Bod" , "A man or woman" , "present appearing in this" , "See 17" , "Type" .)