Possible Clues:

• Australia's ___ Rock
• Australia's __ Rock
• ___ Rock (Aussie landmark)
• ___ Rock (Uluru)
• ___ Rock (Australian landmark)
• Roy of jazz or Kevin of rock
• Funk's Roy
• ___ Rock (Uluru's old name)
• Bill ___, noted Vietnam War-era activist
• Bill mentioned often in the course of 2008 presidential mudslinging