Related Clues:

• Accent that's been spreading out from London
• Wide lower tidal part of a river
• Lower part of a tidal river
• Warranted
• Mouth of a river
• Sea inlet
• Current meeting place set to be switched before end of Jan?
• Where saltwater and freshwater mix
• Properly deserved
• Wide river mouth
• Mouth a sort of English
• Here one comes close to the main form of English
• Sort of English channel
• Big mouth going regularly up and down
• Mouth - or say - true exchanges