Related Clues:

• Pokémon, for one
• Pet Rock, famously
• Fashion direction
• Passing thing
• Passing fancy
• The Macarena, e.g.
• Business direction
• Passing rage
• It's in for a while
• Upswing on a chart
• Pollster's finding
• __ diet
• Market analyst's find
• Temporary trend
• Sudoku, for one