Cylinder (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cylinder</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that drum is a type of cylinder)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for drum that I've seen before include "house" , "Tap" , "See 18" , "nightclub" , "one will be beaten" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cylinder</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that tube is a type of cylinder)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tube that I've seen before include "train network" , "Pipe (with trains?)" , "Hollow cylindrical object" , "Pipe or hose" , "Valve" .)