Envy company doctor (5)
I believe the answer is:
covet
'envy' is the definition.
(coveting is a kind of envying)
'company doctor' is the wordplay.
'company' becomes 'co' (abbreviation).
'doctor' becomes 'vet' (vet is a kind of doctor).
'co'+'vet'='COVET'
(Other definitions for covet that I've seen before include "Jealously desire" , "Yearn to possess (another's property)" , "Crave, long to possess" , "Hanker after" , "Crave something belonging to someone else" .)