An irritable "I have come to see the doctor" (9)

I believe the answer is:

impatient

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

'an irritable' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

(Other definitions for impatient that I've seen before include "Unlike Job" , "those who hate waiting" , "Job wasn't" , "Over-eager" , "Restlessly eager" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app