28 across
Article
with
check
so
enclosed?
(7)
Article with check so enclosed? (7)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
The definition is so enclosed? — "therein" meaning contained within, with the question mark giving a cheeky wink at that idea of being tucked inside something. "Article" gives you THE, then "check" as in restrain gives you REIN, and you just run them together.