|  | SAYSAYSAY | Paul McCartney/Michael Jackson hit ... or a hint to the starts of 17-, 24-. 57- and 65-Across | 
|  | BEATIT | Michael Jackson hit ... or what you can do to the start of each answer to a starred clue | 
|  | FOODFIGHT | What could cause a mess in a mess, and a hint to 18-, 24-, 57- and 63-Across | 
|  | WHOLETTHEDOGSOUT | 2000 novelty hit ... or a hint to the answers to the nine starred clues | 
|  | CROSSROADS | 1969 Cream hit ... or a hint to the seven "mathematical" clues in this puzzle | 
|  | POOLPARTY | Summer shindig, and a hint to the starts of 17-, 24-, 41- and | 
|  | TIMECHANGE | Daylight saving adjustment (and a hint to the starts of 17-, 24-, 39-, | 
|  | SLOG | A snail's-pace plod, trudge or tiring trek; a strenuous spell of exhausting graft; a hard hit; or, a heavy blow (4) | 
|  | UNDERTHESEA | "The Little Mermaid" hit ... or a phonetic hint to finding the third key letter in this puzzle | 
|  | ITTAKESAVILLAGE | 1996 Hillary Clinton best-seller, and what might be said about the start of 17-, 24-, 48- or 59-Acro | 
|  | PRO | Expert, and what's in motion in 1-, 20-, 40-, 57- and 71- Across | 
|  | FOODFOR | With 42-Across, something to consider, and a hint to the double meaning of the ends of 17-, 21-, 57- and 66-Across | 
|  | STRIKE | Word that can mean "a hit" or "a miss" | 
|  | BATS | Tries for a hit or a walk | 
|  | ATBAT | It may result in a hit or a walk | 
|  | LIGHTWEIGHT | Boxer who tips the scales at between 57 and 60 kilos (11) | 
|  | BUGATTIS | Cars like the Type 57 and Royale (8) | 
|  | LEADEROFTHEPACK | 1964 Shangri-Las hit ... or a hint to this puzzle's theme found in 17-, 24-, 47- and 59-Across | 
|  | DONT | 2014 Ed Sheeran hit ... or a contraction | 
|  | SLEEPER | Surprise hit, or a 1973 Woody Allen movie |