Come on strong (6)
I believe the answer is:
insist
(Other definitions for insist that I've seen before include "Demand firmly" , "Assert firmly" , "Demand forcefully" , "'Demand, make sure (6)'" , "Demand persistently" .)
I believe the answer is:
insist
(Other definitions for insist that I've seen before include "Demand firmly" , "Assert firmly" , "Demand forcefully" , "'Demand, make sure (6)'" , "Demand persistently" .)