Possible Clues:

• Encourage me to turn unnaturally blonde
• Central characters in December's traditional cheer
• Encourage English doctor to take on the ancient
• Make more courageous
• Cheer is loud -- two letters in a row written about it
• Give confidence to
• Give heart to
• Rally for English old men angry about Brexit leadership
• Encourage noble dame working answer out
• To encourage old men, be dishevelled!