Irritable and being touchy, ultimately (4)

I believe the answer is:

edgy

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'irritable and being touchy ultimately' is the definition.
I can't judge whether this defines the answer.

'irritable and being touchy ultimately' is the wordplay.
'ultimately' suggests the final letters.
The last letters of 'irritable and being touchy' are 'EDGY'.

Can you help me to learn more?

(Other definitions for edgy that I've seen before include "In a tense state" , "Nervous; jumpy" , "Overstrung" , "Sharp in outline" , "ready to flap?" .)

I've seen this clue in The Times.

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