You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.

Category: THE REAL LAND OF OZ 
Clue: This party led Australia from 1983 to 1996, while a party of the same name was Britain's opposition
labor

Category: "HEAD" LINES 
Clue: This phrase may precede "above the rest" or "shampoo"
head and shoulders

Category: QUOTED IN BARTLETT'S 
Clue: Cartoonist R. Crumb gets the credit for this 3-word slogan

"keep on truckin\'"