| SEMILUNAR | Shaped like half a circle or a crescent (9) |
| HORN | Part of an antler; or, a projection or object resembling the shape of thus, such as a cornucopia, pommel of a Western saddle or a crescent tip (4) |
| LUTENIST | One who played an old stringed instrument shaped like half a pear (8) |
| LUTE | Old instrument shaped like half a pear |
| RINGLET | A corkscrew- or spiral-shaped curl of hair; a fairy dance in a circle; or, a velvety brown butterfly that derives its name from its small eye-spots (7) |
| ARC | From Latin for "bow", thus reflecting a curved shape, a word for a segment of a circle; or, a luminous discharge of electricity across a gap (3) |
| QUADRANT | From the Latin meaning "four", a fourth part/sector of a circle; or, a mariner or stargazer's old instrument with a graduated arc of 90 degrees for measuring altitudes (8) |
| RONDE | French word for a whole note; a dance performed in the form of a circle; or, a kind of upright script (5) |
| OCTANT | One-eighth of the circumference of a circle; or, a section of a compass rose (6) |
| SINGAPORE | With a red-and-white flag bearing a crescent and five stars, an island city-state on the Malay Peninsula's southern tip (9) |
| SHAPE | A geometric figure such as a circle or triangle; or a phantom (5) |
| SEMI | Prefix with circle to mean half a circle |
| ALPHACENTAURI | First of a 1 for something like half a century (5,8) |
| FIB | Lie a little like half a leg-bone (3) |
| COMPASS | The range of half a circle-maker? (7) |
| OREO | Cookie shaped like half its letters |
| RADIUS | Half a circle's diameter (6) |
| WITCH | General name for a sorceress such as the one depicted in John William Waterhouse's Magic Circle or a |
| PERFECTO | Ideal circle, or a big drag? |
| ORBIT | Circle, or a small part? (5) |
