Is taken aback by a fair's attractions (5)

I believe the answer is:

rides

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'attractions' is the definition.
(I know this)

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

(Other definitions for rides that I've seen before include "Comes through" , "Trips" , "is carried" , "Travels on, horse say" , "journeys by bike?" .)

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

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