The subject: kids! (5)
I believe the answer is:
issue
This clue is a double definition.
'the subject' is the first definition.
('issue' can be a synonym of 'subject')
'kids' is the second definition.
(legal term for a person's children)
(Other definitions for issue that I've seen before include "Topic; give out" , "The children to come forth" , "Copy of a magazine, for instance" , "Contentious point" , "Children, edition" .)