| OTTAWA | Chief tributary of the St. Lawrence River |
| OTAWA | Major tributary of the St. Lawrence |
| ESTUARY | An example of one is the wide part of the St. Lawrence River where it meets the Gulf of St. Lawrence |
| IRTYSH | River of Siberia that is the chief tributary of the River Ob (6) |
| KAMOURASKA | 1970 Anne Hebert historical novel sharing the name of the St. Lawrence River village in the Bas-saint-laurent region of Quebec where it is set |
| JUMNA | River in India, chief tributary of the River Ganges (5) |
| ANTICOSTI | Island at the mouth of the St. Lawrence River in Quebec |
| CARTIER | French discoverer of the St Lawrence river |
| BENUE | River of N. Nigeria the chief tributary of R. Niger |
| LOSTVILLAGES | The Ontario communities permanently submerged in 1958 for the construction of the St. Lawrence Seaway as they are known: 2 wds. |
| UPRIVER | Towards the source of the St. Lawrence, e.g. |
| ENE | General dir. of the St. Lawrence River |
| UBOAT | Raider in the battle of the St. Lawrence |
| CANTERBURY | Location of the St Lawrence Ground, formerly Britain's only major cricket venue with a tree inside the boundary |
| LOCKS | Parts of the St. Lawrence Seaway |
| ERIE | One end of the Saint Lawrence Seaway |
| QUARANTINESTATION | The 'Grosse Ile and the Irish Memorial' is a National Historic Site of Canada on the St. Lawrence River where there was one in operation for immigrants at the Port of Quebec, from 1832 to 1937: 2 wds. |
| PLAINSOFABRAHAM | Plateau in E Canada between the city of Quebec and the St Lawrence River; scene of an important British victory (1759) in the Seven Years' War (6,2,7) |
| RHONE | 505-mile (813 kilometres) river of Switzerland and France whose chief tributary is the Saone (5) |
| PLAINSOF | Field between central Quebec City and the St Lawrence River, Canada; site of a 1759 British victory in the Seven Years" War (6,2,7) |
