Large sherry glass (8)
I believe the answer is:
schooner
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">large sherry glass</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for schooner that I've seen before include "Large beer or sherry glass" , "Two-master; a glass" , "Sailing vessel - drinking vessel" , "9 [CONTAINER" , "Old sailing vessel and large glass" .)