Strong resentment of strangers? (5)

I believe the answer is:

anger

I'm a little stuck... Click here to teach me more about this clue!

'strong resentment' is the definition.
'anger' can be an answer for 'resentment' (I've seen this in another clue). I'm not sure about the 'strong' bit.

'of strangers?' is the wordplay.
'of' indicates the answer is hidden within the clue.
'ANGER' can be found hidden inside 'strangers'.

Can you help me to learn more?

(Other definitions for anger that I've seen before include "Nettle" , "Deadly sin" , "Extreme annoyance" , "exasperation" , "Spleen" .)

I've seen this clue in the Evening Standard.

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