A doctor owes me? Excellent! (7)
I believe the answer is:
awesome
'excellent' is the definition.
(I've seen this in another clue)
'a doctor owes me?' is the wordplay.
'doctor' indicates anagramming the letters.
'owes' anagrammed gives 'weso'.
'a'+'weso'+'me'='AWESOME'
(Other definitions for awesome that I've seen before include "Really excellent" , "Amazing - fearful" , "Inspiring admiration or wonder" , "Daunting" , "Simultaneously wonderful" .)