We're off to get jug (4)
I believe the answer is:
ewer
'jug' is the definition.
(type of vessel)
'we're off' is the wordplay.
'off' indicates anagramming the letters.
'were' with letters rearranged gives 'EWER'.
'to get' is the link.
(Other definitions for ewer that I've seen before include "A wide-lipped jug" , "Jar for water" , "Water-jar" , "Decorative pitcher" , "Big jug" .)