Liquid-conveying tube (I, not Y) (6)

I believe the answer is:

siphon

(Other definitions for siphon that I've seen before include "Tube taking fluid from higher to lower point" , "Tube used to draw a liquid" , "Bottle from which a liquid is forced by pressure of gas" , "Tube down which liquid flows unaided" , "Tube drawing off liquid" .)

I've seen this clue in The Times.

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