People upset by ant bites? (8)

I believe the answer is:

tibetans

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

'people upset by ant bites?' is the definition.
'tibetans' can be an answer for 'people' (I've seen this before). I'm not sure about the 'upset by ant bites?' bit.

'upset by ant bites?' is the wordplay.
'upset by' is an anagram indicator.
'ant'+'bites'='antbites'
'antbites' is an anagram of 'TIBETANS'.

Can you help me to learn more?

(Other definitions for tibetans that I've seen before include "Highland people" , "Citizens of Dalai Lama's country" , "They be titans who live in the Himalayas" , "Mountain folk" , "Foreigners" .)

I've seen this clue in the Evening Standard.

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