Tryingly peevish? (5)

I believe the answer is:

testy

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'peevish?' is the definition.
(I know that cranky can be written as testy)

I don't understand how the remainder of the clue works.

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(Other definitions for testy that I've seen before include "Easily irritated" , "Quick to anger" , "likely to flare up?" , "Irascible" , "Irritably impatient" .)

I've seen this clue in the Evening Standard.

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