Tryingly peevish? (5)
I believe the answer is:
testy
'peevish?' is the definition.
(I know that cranky can be written as testy)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for testy that I've seen before include "Easily irritated" , "Quick to anger" , "likely to flare up?" , "Irascible" , "Irritably impatient" .)