Interrupt, disturb (7)
I believe the answer is:
disrupt
This clue is a double definition.
'interrupt' is the first definition.
(I know that disrupt is a more specific form of the action barge in)
'disturb' is the second definition.
(I've seen this before)
(Other definitions for disrupt that I've seen before include "Break up" , "Disturb" , "Interrupt and spoil" , "Throw into disorder" .)