The most common and most likely answer to this crossword clue is the 5 letter word SPATE
S
P
A
T
E
More clues leading to the result SPATE
- Row close to huge wave
- A lot of similar things? Exactly right in southeast
- Noah’s beginning to leave pens at being prepared for flood
- Inundation well above odd ones appearing in Tees
- Quarrel over eastern flood
- Water valves turned before engineer’s first flood
- Flood bringing core of slurry to the fore?
- Turn taps a quarter and get a flood
- Flood starts swirling overhead
- Bunch of mixed tapes
Buddy explains!

The straight part
We know that "Inundation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case inundation = spate.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 SPATE mean?
SPATE noun- A river flood; an overflow or inundation.
- (by extension) A sudden rush or increase.