Stipulation, condition (7)
I believe the answer is:
proviso
This clue is a double definition.
'stipulation' is the first definition.
(I know that proviso is a type of stipulation)
'condition' is the second definition.
(I know that proviso is a type of condition)
(Other definitions for proviso that I've seen before include "Condition of stipulation of an agreement" , "Condition, qualification" , "Stipulation (in contract)" , "Condition added to an agreement" , "Condition for VIP or so" .)