Patsy's upset, looking pallid (5)

I believe the answer is:

pasty

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'pallid' is the definition.
(synonyms)

'patsy's upset looking' is the wordplay.
'patsy' anagrams to 'PASTY'.
Though, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for pasty that I've seen before include "Far from healthy-looking" , "food?" , "little pie" , "snack" , "Cornish speciality" .)

I've seen this clue in the Evening Standard.

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