| DRAG | Air resistance in fluid mechanics; a harrow; a mail-coach; or, an artificial scent for foxhounds to pursue (4) |
| STAGER | Old word for an actor; a horse for pulling a passenger/mail-coach; or, an old hand, veteran or other adept of much worldly experience (6) |
| TORQUE | In physics and mechanics, a force that imparts rotation to a body to which it is applied (6) |
| POSTHORN | Instrument used to signal the arrival or departure of a mail coach (4,4) |
| STEW | A dish such as a casserole or a daube; or, an artificial oyster bed (4) |
| PERIGEE | Closest point to the Earth in the orbit of the moon or an artificial satellite (7) |
| TESTER | A tizzy or sixpence; a quizzer or examiner; a canopy over a four-poster bed; or, a miniature pot of paint, a sample or a scent, for one to try (6) |
| CHUTE | A rapid or waterfall; a slide into a swimming-pool; a log flume; or, an informal word for a canopy providing air resistance during a jump (5) |
| MACH | Ernst, Austrian physicist born in 1838 who has a number in fluid mechanics named after him (4) |
| DISC | Something flat and round, such as a CD, cutter of a harrow, daisy's "eye", gramophone record, quoit, plate or an old tax label for a motor vehicle (4) |
| FORCES | In physics, dynamic influences such as gravity, air resistance, thrust, torque or magnetism that cause objects to undergo specific changes (6) |
| HUNTER | Horse used for point-to-point or a pursuit with foxhounds; Nimrod; Orion; or, pocket watch with a hinged cover protecting its glass (6) |
| REYNOLDS | Name of a quantity number in fluid mechanics, symbol Re (8) |
| COUPLE | Two foxhounds; or, a pair of partners in a game, dance or relationship (6) |
| PACKS | Sets of playing cards; groups of runners in races, foxhounds, Brownies, Cub Scouts, submarines or thieves; or, bundles carried on one's back or that of a donkey (5) |
| BERNOULL | Pioneer in fluid mechanics |
| MISCHANCE | Unfortunate occurrence in fluid mechanics (9) |
| CHEERIOS | __ effect: phenomenon of attraction in fluid mechanics, familiarly |
| DRAGHUNT | In which hounds are trained to follow artificial scent (4,4) |
| CHASE | Event for foxhounds |
