The most common and most likely answer to this crossword clue is the 8 letter word PROXIMAL
P
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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 PROXIMAL mean?
PROXIMAL adjective- Closer to the point of attachment or observation.
- Facing toward another tooth. The proximal surfaces of a tooth are those that touch or are close to neighboring teeth.
- Closer to the speaker.