| MAKEENDSMEET | Tunnellers hope to follow Dickens' recipe for happiness |
| FENGSHUI | 17 recipe for happiness supplied with fungi she cooked (4,4) |
| MOLEST | Paw with which tunnellers start to tunnel |
| ALEGRIA | Spanish for "happiness" (as heard in the lyrics to "Macarena") |
| GEOMYS | Group of tunnellers and Gentile taking turns with small spaces |
| SUBWAYENGINEERS | Highly paid, usually city-dwelling, 190cm Canadian tunnellers |
| AMERICANBADGERS | Powerful, hairy, 75cm Canadian tunnellers |
| CARPENTERANTS | Industrious, 2cm Canadian tunnellers |
| SELDOM | Tunnellers sent back across Germany rarely (6) |
| DIG | Paracoprids ___ down below a pile of dung and are known as tunnellers |
| GROUNDSQUIRREL | Tunneller's reasons to argue after one replaces article (6,8) |
| EARTHWORM | Tunneller finds planet getting hot -- Arctic cap's close to zero (9) |
| EXAMINER | One looks for information from a tunneller |
| INERM | Spineless tunneller, heading right to the back |
| PRAIRIEDOG | I'd go and repair ground for tunneller (7,3) |
| MOLECULE | Tunneller might provide clue to particle (8) |
| CUSHY | From Urdu for "pleasure" and Hindi for "happiness", a slang word, popularised by British soldiers in India, meaning "easy, comfortable" (5) |
| SELFISH | "To be stupid, _, and have good health are three requirements for happiness, though if stupidity is lacking, all is lost": Gustave Flaubert (7) |
| CLOUDNINE | High spot for happiness |
| FELICIA | Woman's name from Latin for "happiness" |
