| DEWEY | Melvil ?, US inventor of a system for the classification of library books |
| TRIBE | One of the "three" phyles of the ancient Romans; a people or clan claiming a common ancestor; or, a group in the classification of animals (5) |
| DOLBY | Ray ?, US inventor of a noise reduction system who died in 2013 (5) |
| WHITNEY | Eli ?, US inventor of a modern mechanical cotton gin (7) |
| GATLING | Richard Jordan ?, US inventor of a rapid-fire hand-cranked gun |
| GELLMANN | Nobel Prize-winning physicist who proposed the concept of strangeness in quarks and contributed towards the classification of elementary particles (4-4) |
| NOSOLOGY | Branch of medical science concerned with the classification of diseases (8) |
| HERALDRY | The occupation or study concerned with the classification of armorial bearings (8) |
| VESTED | ____ interest, one normally supporting the continuance of a system for personal reasons (6) |
| EDISON | Thomas Alva ?, US inventor of the phonograph (6) |
| ROSA | Maglia -; Italian for the pink jersey worn by the leader of the classification in the Giro d'Italia road cycle races (4) |
| DREW | Richard ?, US inventor of masking tape and Scotch Tape |
| MORSE | Samuel ?, US inventor and painter whose works include The Chapel of the Virgin at Subiaco |
| TAXONOMIC | Of the classification of animals and plants (9) |
| ETHNIC | Relating to the classification of mankind into groups (6) |
| BANTAMWEIGHT | The classification of boxers who weigh between 52.2 and 53.5 kg (12) |
| TIMESLOT | Paper put on the front of library books giving place in schedule |
| NOSOLOGIST | One who specialises in the classification of diseases |
| TAXONOMY | The classification of animals or plants (8) |
| MOOG | US inventor of a type of musical synthesizer |
