| REGULATING | Controlling the rate of (10) |
| HORSEPOWER | Unit measuring the rate of work of an engine (10) |
| PACEMAKERS | They set the rate, of course (10) |
| COMMUNISMS | Supporters of a political movement advocating a classless society and workers controlling the means of production (10) |
| MONETARIST | Advocate of controlling the economy via the cash supply (10) |
| TACHOMETER | A device for measuring speed, especially the rate of revolution of a shaft |
| SETTHEPACE | Fix the rate, of course |
| SLUICEGATE | A device for controlling the flow of water, especially in a lock (6,4) |
| VELOCITY | A measure of the rate of motion of a body expressed as the rate of change of its position in a particular direction with time |
| SECOND | Newton's ___ law of motion states that the rate of change of momentum of a body is directly proportional to the external force acting on it (6) |
| PACE | Meaning "stretch of the leg", a step; the distance covered by said stride; a gait of a horse; or, the rate of cantering, running, walking etc (4) |
| FEED | An amount of provender for cattle or of sustenance for a baby; a plentiful meal; the rate of progress of a lathe; or, an actor's stooge (4) |
| TAP | A cask's stopper for controlling the flow of beer; or, a faucet for controlling the flow of water/gas (3) |
| MARKET | A regular gathering for the buying/selling of livestock or provisions; the rate of sale; or, a grocery store (6) |
| BRAKEHORSEPOWER | Unit for measuring the rate of work of a motor (5,10) |
| PAR | "Equal", level or norm, be it the current state of affairs, golf, one's health, the rate of exchange or one's shares (3) |
| TEAR | Change the rate of a drop from the eye |
| ACCELEROMETER | Instrument measuring the rate of change of speed (13) |
| PRODUCTIVITY | Measure of the rate of industrial output (12) |
| HIGHSPEED | A song by Coldplay; or, a general description of the rate of a bullet train or broadband over 10Mbps (4,5) |
