Cryptic crossword clue
Core penetrated by something that flies a short distance 10

The most common and most likely answer to this crossword clue is the 11 plus 1 letter word CENTIMETRE} –

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Buddy explains!

The straight part
We know that "a short distance" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a short distance = centimetre} –.
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 CENTIMETRE} – mean?

CENTIMETRE} – noun
  1. An SI unit of length equal to 10-2 metres. Symbol: cm

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