Dodgy dealer upsetting VIPs (4)
I believe the answer is:
spiv
'dodgy dealer' is the definition.
(I've seen this before)
'upsetting vips' is the wordplay.
'upsetting' shows that the letters should be reversed in order.
'vips' in reverse letter order is 'SPIV'.
(Other definitions for spiv that I've seen before include "Arthur Daley type" , "Someone making money by dubious means" , "wheeler-dealer" , "Smartly-dressed, but dubious, fellow" , "Timepiece" .)