16 clues for "MARCO":
- ___ Millions, O'Neill play
- Polo.
- Piazza San Venice
- Traveler Polo
- Call answered with "Polo"
- Call followed by "Polo!" in a kids' game
- Explorer Polo
- ___ Island, Fla.
- Millions Eugene ONeill play
- Niccolo's son, the traveler
- ONeill hero
- ONeills Millions
- One of the Polos.
- Patron saint of Venice Ital.
- Sinatra's role in 'The Manchurian Candidate'
- Water Polo elicitor