Crossword puzzle clue "without a single appointment"

Without a single appointment

Touting for business without an appointment

Arrives without an appointment

Kids' character who says "A day without a friend is like a pot without a single drop of honey left inside"

Answer to the riddle "What has rivers without water, forests without trees, and cities without houses?"

They make you remember a single single

Motivation to keep a doctor's appointment

Set ___ (make an appointment)