Be determined to attack (5)

I believe the answer is:

beset

'attack' is the definition.
(besetting is a kind of attacking)

'be determined' is the wordplay.
'determined' becomes 'set' (similar in meaning).
'be'+'set'='BESET'

'to' is the link.

(Other definitions for beset that I've seen before include "Assail or attack on all sides" , "Harry" , "Hemmed in or surrounded" , "besieged" , "Plagued" .)

I've seen this clue in The Globe and Mail.

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