Crossword Genius

Unbalanced some wares on show at the greengrocer's (7)

Ross

I believe the answer is:

bananas

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'unbalanced some wares' is the definition.
Although both the answer and definition are plural nouns, I can't understand how one could define the other.

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

Can you help me to learn more?

(Other definitions for bananas that I've seen before include "nutty" , "Fruit; mad" , "Mad - curved fruits" , "Crazed" , "off 27 [TROLLEY]" .)

I've seen this clue in the Evening Standard.
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