Schoolgirl or company man (2-2)
I believe the answer is:
co-ed
'schoolgirl' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'company man' is the wordplay.
'company' becomes 'co' (abbreviation).
'man' becomes 'ed' (short for Edward).
'co'+'ed'='CO-ED'
'or' acts as a link.
Can you help me to learn more?
(Other definitions for co-ed that I've seen before include "School for boys and girls, in short" , "Teaching attended by both sexes" , "School for both sexes" , "Teaching both girls and boys" .)