Champagne flute part (4)
I believe the answer is:
stem
'champagne flute part' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stem that I've seen before include "Originate (from)" , "Stanch" , "Staunch - support" , "Slender vertical part, glass or plant" , "Stop; stalk; ship's timber" .)