French wine parts clog up plastic drinking vessel (6,3)
I believe the answer is:
loving cup
'drinking vessel' is the definition.
(loving cup is a kind of drinking vessel)
'french wine parts clog up plastic' is the wordplay.
'french wine' becomes 'vin' ('wine' in French).
'parts' indicates putting letters inside (inserted letters separate or part others).
'plastic' is an anagram indicator (plastic can mean easily moulded).
'clog'+'up'='clogup'
'clogup' with letters rearranged gives 'logcup'.
'vin' placed into 'logcup' is 'LOVING CUP'.
(Other definitions for loving cup that I've seen before include "trophy" , "Banquet's two-handled drinking vessel" , "well-handled, one passes" , "goblet" .)