Sudden attack leads to capture (7)
I believe the answer is:
seizure
I believe this is a double definition.
'sudden attack' is the first definition.
(I've seen this before)
'capture' is the second definition.
(I know that capture can be written as seizure)
'leads to' acts as a link.
(Other definitions for seizure that I've seen before include "convulsion?" , "Act of grabbing" , "Sudden fit" , "Taking possession by legal process" , "Paroxysm" .)