Possible Clues:

• A stand-in doctor
• Look, with Latin one may step into someone else's job
• Many a top man with little hesitation gets a stand-in
• Stand-in doctor, left on call, usually manages at first
• Stand-in senior officer rejected with hesitation ...
• A substitute or stand-in doctor
• Behold this with the substitute
• See monsieur embracing copper, the deputy
• One making up for lack of practice
• Half lost, arrive noisily with medical assistance