Tool providers wanting drink (6)
I believe the answer is:
pliers
'tool' is the definition.
(pliers is a kind of tool)
'providers wanting drink' is the wordplay.
'providers' becomes 'suppliers' (people who provide things).
'wanting' is a deletion indicator (to want something can mean to lack it or need it).
'drink' becomes 'sup' (to sup is to drink).
'suppliers' with 'sup' removed is 'PLIERS'.
(Other definitions for pliers that I've seen before include "Hand tool used for gripping" , "Gripping tool with two serrated jaws" , "Workmen's tools" , "taxi-drivers, say" , "Tool with jaws for gripping small objects" .)