Crossword Genius

Ulcer or boil observed by one's ear? (4)

Ross

I believe the answer is:

sore

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

This could be a double definition.

'ulcer' is the first definition.
(thesaurus)

'boil observed by one's ear?' is the second definition.
'sore' can be an answer for 'boil' (boil can mean a sore or inflammation). I'm unsure of the 'observed by one's ear?' bit.

'or' acts as a link.

Can you help me to learn more?

(Other definitions for sore that I've seen before include "Rose (anag.)" , "Eros (anag.)" , "Irritated or painful" , "Causing or suffering pain" , "Aggrieved" .)

I've seen this clue in The Guardian.
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