The Tube one can take to Kew Gardens? (8)

I believe the answer is:

hosepipe

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'the tube' is the definition.
(hosepipe is a kind of tube)

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

(Other definitions for hosepipe that I've seen before include "Flexible tube for conveying water" , "Flexible watering tube" , "used to water" , "it will water garden" , "It's used in watering" .)

I've seen this clue in The Times.

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