Crossword Genius

One grows flowers (6)

Ross

I believe the answer is:

irises

'flowers' is the definition.
(type of flower)

'one grows' is the wordplay.
'one' becomes 'i' (Roman numeral).
'grows' becomes 'rises' (rise can mean to grow or increase).
'i'+'rises'='IRISES'

(Other definitions for irises that I've seen before include "Flags" , "Is sire in favour of flowers?" , "Plants with sword-shaped leaves" , "Eye membranes or showy flowers." , "Parts of eyes or flowering plants" .)

I've seen this clue in The Guardian.
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