Understood to have been captured (5)
I believe the answer is:
taken
I believe this is a triple definition!
'understood' is the first definition.
(synonyms)
'to have' is a link.
'been' is the second definition.
(taking is a kind of being)
'captured' is the third definition.
(I've seen this before)
(Other definitions for taken that I've seen before include "Charmed" , "Removed, accepted" , "Appropriated" , "Obtained" , "Seized" .)