Crossword Genius

Plant genus I discovered in Kildare town (5)

Ross

I believe the answer is:

naias

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

'plant genus' is the definition.
'Naias' can be an answer for 'genus' (Naias is an example). I'm not sure about the 'plant' bit.

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Another definition for naias that I've seen is " water plants".)

I've seen this clue in The Times and The Sunday Times.
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