Wineglass part (4)
I believe the answer is:
stem
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wineglass part</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 stem that I've seen before include "section of pipe" , "Stalk; stop (flow)" , "Ski turn and plant support" , "part of a ship" , "Hold back - stock - check" .)