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Swelling troubling your eyelid, basically (4)

Ross

I believe the answer is:

stye

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'swelling' is the definition.
(stye is a kind of swelling)

'troubling your eyelid basically' is the wordplay.
'troubling' becomes 'st' (I can't explain this - if you can you should give a lot more credence to this answer).
'basically' suggests taking the first letters (the first letter could be its root or base).
The first letters of 'your eyelid' is 'ye'.
'st'+'ye'='STYE'

Can you help me to learn more?

(Other definitions for stye that I've seen before include "Infected swelling of the eye" , "Red eye" , "swelling by organ" , "Tamworth residence" , "Eyelid affliction" .)

I've seen this clue in The Hindu.
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