Jack takes the tube (5)

I believe the answer is:

straw

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'tube' is the definition.
(I know that straw is a type of tube)

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

(Other definitions for straw that I've seen before include "The last one broke the camel's back" , "Means to absorb" , "remnant of harvest" , "Warts (anag.)" , "politician" .)

I've seen this clue in the Evening Standard.

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