Large glass sailing ship (8)
I believe the answer is:
schooner
I believe this clue is a double definition.
'large glass' is the first definition.
(type of glass)
'sailing ship' is the second definition.
(I know that schooner is a type of sailing ship)
(Other definitions for schooner that I've seen before include "Item used for drinking" , "Large beer or sherry glass" , "No chores on this sailing ship" , "Two-master; a glass" , "wooden vessel" .)