What does the cryptic crossword clue "Marshy land in inlet edges well away from ground (5)" mean?

The wordplay uses a deletion. BAY (synonym="inlet") + OU (synonym="OU") = BAYOU The answer is BAYOU.

Marshy land in inlet edges well away from ground (5)

Guardian Cryptic #29609 | 23 Down | 2025-02-04 flower