Possible Clues:

• Junior hospital doctor
• Junior doctor
• Young doctor (and 5 down?)
• Poet and classicist entertaining English hospital doctor
• Medic who's training English poet to inject drug
• Poet's pronouncement for doctor
• Poet and classicist carrying note for doctor
• Medic calls round after forty-five minutes?
• Doctor crossing river is hard fellow
• The kind of doctor he's not an outdoor type