Crossword Genius

Carrying family member, car reversed round the bend (7)

Ross

I believe the answer is:

bananas

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'round the bend' is the definition.
(thesaurus)

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

Can you help me to learn more?

(Other definitions for bananas that I've seen before include "Mad - curved fruits" , "Crazed" , "Fruit - nuts" , "hands" , "bats" .)

I've seen this clue in The Guardian.
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