The most common and most likely answer to this crossword clue is the 8 letter word SATURATE
I've seen this crossword clue in Independent
S
A
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More clues leading to the result SATURATE
- Planet almost consumed in flood
- With no end in sight, planet consumed in flood
- Swamp rat in US ate bananas
- Really wet day clergyman initially disregarded
- Steep charge settled by university at the top
- Distant place endlessly eroded by flood
- Acts up oddly, in tears when suffering overload
- Artist brought in statue damaged in flood
- Settled charge with University admittance is steep
- Thoroughly wet when most of planet’s destroyed
Buddy explains!

The straight part
We know that "Really wet" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case really wet = saturate.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 SATURATE mean?
SATURATE noun- Something saturated, especially a saturated fat.
- To cause to become completely impregnated, or soaked (especially with a liquid).
- To fill to excess.
- To satisfy the affinity of; to cause a substance to become inert by chemical combination with all that it can hold.
- To render pure, or of a colour free from white light.
- Saturated; wet.
- Very intense.