The most common and most likely answer to this crossword clue is the 5 plus 4 letter word TIDAL WAVE
I've seen this crossword clue in Financial Times
T
I
D
A
L
W
A
V
E
More clues leading to the result TIDAL WAVE
- Woman engaged in live data streaming — it could swamp her
- Women entering live data about tsunami?
- Curiously wild at greeting a crashing bore
- Validate changes coming about with widespread feeling
- View a lad represented after time to show natural phenomenon
- Note pulses with average flow
- With wife lived at a resort, it’s a bore
Buddy explains!
The straight part
We know that "tsunami" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tsunami = tidal wave.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.