When attacked, you need to be determined (5)

I believe the answer is:

beset

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'when attacked you need' is the definition.
The answer and definition can be both to do with human feelings as well as being verbs in their base form.
Maybe you can see a link between them that I don't see?

'be determined' is the wordplay.
'determined' becomes 'set' (synonyms).
'be'+'set'='BESET'

'to' acts as a link.

Can you help me to learn more?

(Other definitions for beset that I've seen before include "Attacked from all sides" , "Hem in, afflict" , "dog" , "Assail or attack on all sides" , "Surround and harass" .)

I've seen this clue in the Evening Standard.

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