Possible Clues:

• *Coastal wetland often exposed at low tide
• Slander linked to apartment, riverside feature
• Foreign character beginning to discover what's opposite to sharp estuary feature
• Sticky area uncovered at low tide
• What may be uncovered at low tide
• Estuarial sight
• It's exposed at low tide
• Daft lump almost floundered in part of estuary
• Area uncovered at low tide
• What's scandalously flung on floor and at uncovered bed