Related Clues:

• Van Gogh's ''Irises,'' e.g.
• Welcome road sign, often
• Lube
• Paint base, sometimes
• Argon or xenon
• 'Black gold'
• 3-IN-ONE, e.g.
• Vinaigrette ingedient
• De-squeak
• Grill fuel
• Rabbit food?
• Motor fuel
• Mason Williams' ''Classical ___''
• ''Lorenzo's ___'' (1992)
• __ and vinegar