Silver Spirit on drive upset miser (7)
I believe the answer is:
niggard
'miser' is the definition.
(synonyms)
'silver spirit on drive upset' is the wordplay.
'silver' becomes 'Ag' (Ag is the chemical symbol for silver).
'spirit' becomes 'gin' (alcoholic spirit).
'on' says to put letters next to each other.
'drive' becomes 'dr' (abbreviation used in road names).
'upset' shows that the letters should be reversed in order.
'ag'+'gin'='aggin'
'aggin' put after 'dr' is 'draggin'.
'draggin' backwards is 'NIGGARD'.
(Other definitions for niggard that I've seen before include "He's tight" , "Stingy type" , "Skinflint" , "Drag gin around for the miser" , "Grading? (Anag)" .)