Crossword Genius

Catheter (4)

Ross

I believe the answer is:

tube

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">catheter</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

(Other definitions for tube that I've seen before include "Pipe or hose" , "Valve" , "Pipe - railway" , "Can of beer (colloquial)" , "Hollow body for the underground" .)

I've seen this clue in the Sydney Morning Herald.
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