Disrupts completely (6)
I believe the answer is:
upends
(Other definitions for upends that I've seen before include "Turns upside down, overturns" , "Stands bottom over top" , "Send up in reverses" , "affects to a great extent" .)
I believe the answer is:
upends
(Other definitions for upends that I've seen before include "Turns upside down, overturns" , "Stands bottom over top" , "Send up in reverses" , "affects to a great extent" .)