Cup without a handle (6)
I believe the answer is:
beaker
'cup without a handle' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for beaker that I've seen before include "Small open glass with straight sides and a lip" , "Cup with a wide mouth" , "Open glass, straight with lip, used in laboratory" , "Tall cup or tumbler" , "Large drinking cup" .)