Possible Clues:

• Elderly are proceeding cautiously about publicity, being nervous
• An old-timer
• One who's seasoned unseasoned meat, might you say?
• What an old-timer may be called
• Over the hill
• Old-timer, perhaps
• Mature kingship is mingled with concern
• Winter endless to one cowardly and old?
• Rather old boiler?
• Well past adolescence