Somewhat alarmed, I called doctor (5)
I believe the answer is:
medic
'doctor' is the definition.
(doctor is a type of medic)
'somewhat alarmed i called' is the wordplay.
'somewhat' indicates a hidden word.
'MEDIC' is hidden in the letters of 'alarmed i called'.
(Other definitions for medic that I've seen before include "Eg, doctor" , "Word for 'doctor'" , "Physician (informal)" , "He may offer treatment" , "Health worker" .)