| LASES | Uses a beam |
| LASE | Use a beam |
| GYMNASTS | Athletes who use a beam, eg |
| TRAMMEL | From "tri mesh", a three-layered dragnet; a hobble for a horse, hence anything that hinders free action; a beam compass; a fowling-net; or, a hook for pots in a fireplace (7) |
| RAM | A beam for battering, breaking or breaching a barricade, bastion, battlement or bulwark; a beak of a boat's bow; or, a buck bellwether (3) |
| BOOM | A bellow or blare of a bittern or bass drum; a bonanza of babies, boodle or bunce; a buoyant barrier; or, a beam (4) |
| CRT | A vacuum tube in which a hot cathode emits a beam of electrons that pass through a high voltage anod |
| SLEEPER | A beam under a railway track; a train carriage with berths/bunks; or, a plain hoop or stud earring (7) |
| RAFT | Word for a beam first, later a floating mass of fallen trees; or, a flat platform of logs as a boat (4) |
| YARDARM | End of a beam supportA-ing a sail on the mast of a square-rigger (7) |
| PROP | A rigid support as a beam, a pole |
| JOIST | A beam used to support a floor or a ceiling (5) |
| TIMBER | Lumber/wood suitable for carpentry or construction; trees collectively; a forest; or, a beam in the framework of a house or ship (6) |
| RADIO | From a word for a beam of light, electromagnetic communication for which Marconi and Tesla were pioneers; a wireless; or, the industry of broadcasting sound (5) |
| ROOD | A cross/crucifix on a beam/screen above the entrance to a chancel (4) |
| SENSOR | A device that detects e.g. a beam of light and responds by transmitting a signal (6) |
| RAY | A beam bringing soldiers to a sticky end? (3) |
| REFULGENT | Give more food to man lacking a little energy, producing a beam (9) |
| RETINOSCOPE | Ophthalmologist's instrument that reflects a beam of light from a mirror into the eye (11) |
| LASER | Where's a long reflection shortened in a beam of light (5) |
