Possible Clues:

• Protestant marching from mountains in state
• Order member's compass in sultanate
• Member of a Protestant Irish society
• Irish fellow plainly much attached to an old house
• Get around the mountainy fellow of the North
• One from the North, and the answer isn't a lemon
• Protestant, a person of no latitude?
• 12th man
• Religious society member's circle called celebrity up
• William III follower