| DITHERS | The river in Hades takes no definite course |
| LETHE | What is the river in Hades whose water, once drunk, causes those to forget their past? (5) |
| ERRATIC | Having no definite course |
| ACHERON | In Greek myths, one of the rivers in Hades over which the souls of the dead were ferried by Charon (7) |
| CHARON | In Greek myth, ferryman who brought the dead across the rivers in Hades (6) |
| MASS | From the Greek for "barley cake", a body of matter with no definite shape; a crowd, flock, herd, the hoi polloi or other number of people or things; weight; or, in another sense, the celebration of th |
| RIO | "When the ... Grande is flowing; And the starry skies are bright," the Yellow Rose of Texas, "Walks along the river; In the quiet summer night" |
| STYX | River in Hades in Greek mythology across which Charon ferried the souls of the dead (4) |
| LATHE | The French and the Greek river in Hades (5) |
| PLANNING | Programme for a definite course of action; strategy (8) |
| GREYAREAS | No definite rules apply in these - ex-Foreign Secretary at first argues referring to withdrawn appea |
| OPENEND | Having no definite duration |
| AGNOSTIC | Coasting around with no definite view (8) |
| NONDESCRIPT | Of no definite kind |
| OPENENDED | Frank finished with no definite conclusion (4-5) |
| NEUTRAL | Having no definite colour |
| SHAPELESS | Having no definite form |
| POSTMODERNHEART | Bodily organ with no definite structure, function, or truth-value at all? |
| AMOEBA | Minute single-celled organism with no definite shape (6) |
| GASES | Sages develop substances with no definite boundaries |
