Businessman caught on farm vehicle (10)
I believe the answer is:
contractor
'businessman' is the definition.
(I've seen this before)
'caught on farm vehicle' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'farm vehicle' becomes 'tractor' (vehicle used on a farm).
'c'+'on'+'tractor'='CONTRACTOR'
(Other definitions for contractor that I've seen before include "One formally agreeing to do job" , "One undertaking specific business" , "Businessman" , "Party to a deal; builder" .)