Specify (9)
I believe the answer is:
stipulate
'specify' is the definition.
(I know that specify can be written as stipulate)
This is all the clue.
(Other definitions for stipulate that I've seen before include "Define, require" , "Specify as an essential part" , "Demand as part of agreement" , "Demand, specify" , "Specify as a condition or requirement" .)