Possible Clues:

• That's the North I catch, even if I cannot score with it
• Anais has the energy to take on young person's number
• To talk - to the dozen is to do so volubly
• It barely misses a score
• Number barred by the golf club?
• Number one beneath what's left
• Almost twenty
• Popular number in the 20th century?
• Upper age limit for 2 Down
• Johnny Unitas wore it