Crossword Genius

Learn new treatment for the kidneys (5)

Ross

I believe the answer is:

renal

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

'treatment for the kidneys' is the definition.
I can't tell whether this definition defines the answer.

'learn new' is the wordplay.
'new' is an anagram indicator.
'learn' anagrammed gives 'RENAL'.

Can you help me to learn more?

(Other definitions for renal that I've seen before include "Referring to organ" , "Like an organ" , "Vital organ's" , "associated with organ" , "Relating to kidneys" .)

I've seen this clue in The Globe and Mail.
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