A fool who could be taken for a ride (3)

I believe the answer is:

ass

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'a fool' is the definition.
(both can mean a stupid person)

I can't explain the rest of the clue.

(Other definitions for ass that I've seen before include "Silly fellow in passionate state" , "Idiotic animal" , "Donkey or silly person" , "Small hoofed animal" , "Long-eared animal" .)

I've seen this clue in The Globe and Mail and The Irish Independent.

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