Possible Clues:

• Wise and experienced counsellor
• 'Guide, philosopher, and friend'
• A wise and learned teacher
• A wise and experienced teacher
• Teacher to emulate
• It's a good thing to get the girl up
• A trusted teacher or advisor
• Wise counsellor (of protege)
• Merton (anag.)
• Trainer taking fellows on to one of Dartmoor's high spots