The most common and most likely answer to this crossword clue is the 8 letter word DELETION
D
E
L
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T
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More clues leading to the result DELETION
Buddy explains!

The straight part
We know that "Striking" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case striking = deletion.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 DELETION mean?
DELETION noun- An item that has been or will be deleted.
- The act of deleting.
- A mutation in which a gene, or other section of DNA, is removed from a chromosome