Crossword Genius

Singular garment, evidently floral (7)

Ross

I believe the answer is:

bloomer

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'singular' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see a link between them that I can't see?

I cannot understand how the remainder of the clue works.

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(Other definitions for bloomer that I've seen before include "Large loaf; or, a mistake" , "Crusty loaf" , "Mistake (colloq.), loaf" , "Big mistake" , "Something from the baker" .)

I've seen this clue in the Evening Standard.
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