Plumbing tubes (5)
I believe the answer is:
pipes
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">plumbing tubes</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pipes that I've seen before include "Tubes - musical instrument" , "Long tubes" , "Hollow tubes" , "Wind instruments" , "Transmits" .)