The most common and most likely answer to this crossword clue is the 8 letter word EXCISION
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More clues leading to the result EXCISION
Buddy explains!

The straight part
We know that "removal" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case removal = excision.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 EXCISION mean?
EXCISION noun- The deletion of some text during editing.
- The removal of a tumor, etc., by cutting.
- The removal of a gene from a section of genetic material.
- The fact that, under certain hypotheses, the homology of a space relative to a subspace is unchanged by the identification of a subspace of the latter to a point.