| ROOTAGE | Fundamental system derived from Old English argot (7) |
| GALACTIC | Relating to a star system derived from milk (8) |
| ASCII | Computer system derived from telegraph code |
| FURZE | Alternative name for gorse, derived from Old English (5) |
| LAST | Derived from Old English meaning "footprint", model upon which shoes/boots are fashioned (4) |
| GRIT | Word for a broad smile, yet derived from Old English meaning "bare the teeth in pain or anger" (4) |
| ANGLING | From Old English for "hook", the sport or pastime of fishing with a rod, line and a baited lure, such as a fly (7) |
| SWEENEY | Argot for "barber"; or, with "Todd", rhyming slang for "flying squad" (7) |
| DIALECT | Argot (7) |
| ORATING | Speaking in argot |
| ANCIENTLIGHTS | Windows-related legal entitlement derived from old crossword answers (7,6) |
| IDEOLOGIST | Supporter of political theory derived from old oil digest |
| SKOL | Drinking toast wishing good health; derived from Old Norse, 'bowl' (4) |
| OSLO | Capital name derived from Old Norse |
| POSTLUDE | Concluding movement derived from old set-up (8) |
| KOWTOWER | Word for groveller, derived from old Chinese custom (8) |
| TRICK | Medieval word derived from Old French meaning "to cheat or deceive"; an illusory or puzzling feat; a characteristic habit or trait; or, a sailor's shift at the helm (5) |
| DINNER | Word for a meal taken in the evening, yet derived from Old French meaning "to have breakfast" (6) |
| SLUG | Alternative British name for a gadfly or horsefly, derived from Old Norse (4) |
| ALEE | Adverb from Old English for "shelter" |
