| PORTIONS | Faulty piston or sections (8) |
| NORTH | Bearing removed from the piston or throttle (5) |
| TYPIST | One punching keys in segment of faulty piston |
| CONTENTS | The list or table of chapters or sections given at the front of a novel, periodical or other publication; or, as a mass noun, the material dealt with in such a work (8) |
| ENDNOTES | Closing explanatory comments, concluding additions, final words or textual afterthoughts bringing chapters or sections to their finish (8) |
| SEGMENTS | FBI agents in groups, or sections (8) |
| PROLOGUE | Meaning "before word", a prefatory speech or section as an introduction to a play, poem or novel; or, a time trial before a stage race in road cycling (8) |
| CROSSBAR | Top tube of a bicycle frame; or, section of a football goal (8) |
| CYLINDER | Shape of a barrel, column or the crown of a top hat; piston chamber; roller in a printing press; or, a tank in a domestic hot-water system (8) |
| PRODUCER | Manufacturer of piston in colour - red, initially (8) |
| UPSTROKE | Rising movement of a piston (8) |
| CAMSHAFT | Part of piston engine (8) |
| MODES | Current styles or fashions in clothes; or, sections of openwork between the solid parts of lace (5) |
| FRAMES | Surrounds for photographs, paintings or spectacles; embroidery tambours; or, sections of beehives designed to hold honeycombs (6) |
| SLUMS | Squalid, overcrowded houses or sections of a city (5) |
| ACTS | Anagram or sections of "Cats" |
| WRISTPIN | Auto mechanic's connecting rod to piston pivot |
| DET | Pistons or Lions, on scoreboards |
| NBATEAM | Pistons or Pelicans |
| YOKES | Pairs of oxen; frames for carrying pails; or, sections of garments around the neck and shoulders (5) |
