Propose bill supported by Liberal European (5)
I believe the answer is:
table
'propose' is the definition.
(as in tabling a motion)
'bill supported by liberal european' is the wordplay.
'bill' becomes 'tab' (a tab is a bill at a bar).
'supported by' says to put letters next to each other (in a down clue, some letters hold up others).
'liberal' becomes 'l' (abbreviation).
'european' becomes 'E' (abbreviation e.g. EU).
'tab'+'l'+'e'='TABLE'
(Other definitions for table that I've seen before include "Move; furniture" , "Array of data" , "Statistical chart" , "counter" , "Food put on this" .)