Roams erratically around Virginia with a vessel (7)
I believe the answer is:
samovar
'a vessel' is the definition.
(samovar is a kind of vessel)
'roams erratically around virginia' is the wordplay.
'erratically' is an anagram indicator.
'around' means one lot of letters goes inside another.
'virginia' becomes 'va' (US state abbreviation).
'roams' with letters rearranged gives 'samor'.
'samor' placed around 'va' is 'SAMOVAR'.
'with' acts as a link.
(Other definitions for samovar that I've seen before include "Russian tea-urn" , "Russian water boiler often used for tea" , "tea maker" , "source of drink" , "tea provider" .)