Large sherry glass (8)
I believe the answer is:
schooner
'large sherry glass' is the definition.
(I've seen this before)
This is all the clue.
(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" .)