Check beneath article in that place (7)
I believe the answer is:
therein
'in that place' is the definition.
(I've seen this before)
'check beneath article' is the wordplay.
'check' becomes 'rein' (both can mean to control or limit).
'beneath' is a charade indicator (letters next to each other) (in a down clue).
'article' becomes 'the' (the definite article).
'rein' after 'the' is 'THEREIN'.
(Other definitions for therein that I've seen before include "Inside that" , "enclosed by that place?" , "Neither (anag) - into that" , "in that respect" .)