Crossword Genius

Eucalyptus for a stubborn cough? (8)

Ross

I believe the answer is:

ironbark

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

'eucalyptus' is the definition.
(I know that ironbark is a type of eucalyptus)

I don't understand the rest of the clue.

Can you help me to learn more?

(Another definition for ironbark that I've seen is " Eucalyptus".)

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