Doing, as is ordered, what's expected from a GP (9)
I believe the answer is:
diagnosis
'what's expected from a gp' is the definition.
(a GP might diagnose a medical problem)
'doing as is ordered' is the wordplay.
'ordered' indicates anagramming the letters.
'doing'+'as'+'is'='doingasis'
'doingasis' is an anagram of 'DIAGNOSIS'.
(Other definitions for diagnosis that I've seen before include "Identification of an illness" , "Interpretation of" , "Identification of a problem from its symptoms" , "doctor's opinion" , "Doctor's verdict" .)