Suction device (6)
I believe the answer is:
siphon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">suction device</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 siphon that I've seen before include "Soda dispenser" , "Drawing device" , "On ship (anag)" , "Draw off (liquid) by pipe" , "Bottle from which a liquid is forced by pressure of gas" .)