Accompany Doctor Cortes (6)
I believe the answer is:
escort
'accompany' is the definition.
(I know this)
'doctor cortes' is the wordplay.
'doctor' indicates anagramming the letters.
'cortes' anagrammed gives 'ESCORT'.
(Other definitions for escort that I've seen before include "conduct" , "Business providing companions for an evening out" , "Accompany (a person)" , "Accompanying attendant" , "Companion (perhaps paid)" .)