Crossword Genius

Flush without one girl (5)

Ross

I believe the answer is:

rosie

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'flush' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?

'without one girl' is the wordplay.
'without' indicates putting letters inside.
'one' becomes 'i' (Roman numeral).
'girl' becomes 'rose' ().
'i' placed within 'rose' is 'ROSIE'.

Can you help me to learn more?

(Other definitions for rosie that I've seen before include "Old song: 'Sweet ..... O'Grady'" , "- - Lee (sl.)" , "Female" , "literary drinking companion" , "lady" .)

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