The most common and most likely answer to this crossword clue is the 7 letter word WETLAND
I've seen this crossword clue in The Daily Telegraph
W
E
T
L
A
N
D
More clues leading to the result WETLAND
- Take the plunge embracing lake in brown swamp
- Fen country wife has dental treatment?
- Swamp with antelope eating tons
- Lad went swimming in marshy area
- Slough‘s moderate Tory followed by fifty plus
- Strangely wanted to surround lake with water-saturated soil
- Western delta is wild — around November it rarely dries out
Buddy explains!

The straight part
We know that "it rarely dries out" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case it rarely dries out = wetland.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does WETLAND mean?
WETLAND noun- (usually in the plural) Land that is covered mostly with water, with occasional marshy and soggy areas.