Sherry glass (8)
I believe the answer is:
schooner
'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 "Type of glass" , "Old sailing ship and tall sherry glass" , "Measure for sherry or kind of sailing ship" , "Large beer or sherry glass" , "A measure or glass for sherry" .)