Crossword Genius

Did a nose operation because they were swollen? (8)

Ross

I believe the answer is:

adenoids

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

'were swollen?' is the definition.
I can't tell whether this defines the answer.

'did a nose operation because they' is the wordplay.
'did a nose' anagrams to 'ADENOIDS'.
Though, I'm not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for adenoids that I've seen before include "Lymph tissue towards back of throat" , "They affect the voice" , "Tissues between back o fnose and throat, sometimes hinder breathing" , "Enlarged spongy tissue between back of nose and throat" , "These in the throat aided son" .)

I've seen this clue in the Sydney Morning Herald.
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