| GENE | Segment or sequence of DNA (4) |
| SYL | Word segment or part of speech for short |
| NICHE | Wall recess, market segment or suitable position (5) |
| PIECE | Sounds like harmony, a segment or section. (5) |
| TRAIN | Word for a dragging part of a robe originally, later a caravan of camels, line of gunpowder, series of railway carriages or sequence of thoughts (5) |
| PIGS | Slang for orange segments; or, animals with litters called farrows (4) |
| PROBLEM | Puzzle, riddle or question set forth for solution; climber's route or sequence of moves in bouldering; or, a chess composition (7) |
| SERIES | Latin word for "row, chain", used in English to describe a succession or sequence of things, such as books, games, programmes or stamps (6) |
| KALEIDOSCOPE | Constantly changing pattern or sequence of elements (12) |
| EPISODE | An event or sequence of events (7) |
| OPERATOR | A sequence of DNA to which a repressor or an activator can bind |
| ATOMIC | Sequence of DNA (to microbiologists) connected with fundamental building blocks |
| INTURN | In proper order or sequence (2,4) |
| OMEGA | Ending of a series or sequence (5) |
| SECTIONS | From Latin meaning "to cut", word for parts or portions, such as slices for microscopic examination, chapters, divisions of orchestras, newspaper departments, orange segments or military subunits, suc |
| CONTINUITY | Smooth development or sequence (10) |
| NARRATIVE | ____ arc, the path or sequence in a story (9) |
| PATTERN | Regular design or sequence (7) |
| CON | Prefix with "test" or "sequence" |
| CHAIN | Connected flexible series or sequence (5) |
