The most common and most likely answer to this crossword clue is the 8 letter word DETERGED
D
E
T
E
R
G
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D
Buddy explains!
The straight part
We know that "being wiped out (rare)" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case being wiped out (rare) = deterged.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 DETERGED mean?
DETERGED verb- To clean of undesirable material, especially a wound (technical).