Possible Clues:

• End of year hold-up involved seasonal visitor?
• Renowned reindeer
• --- Valentino, actor
• He sheds light for Santa
• Run pub to entertain loud, drunken reindeer
• Leader of reindeer facing terrible hold-up?
• German king, founder of the Habsburg dynasty
• Reindeer not in the Moore poem
• Who's depicted in this puzzle when the circled letters are connected from A to Z and back to A
• First reindeer