The most common and most likely answer to this crossword clue is the 9 letter word ACQUAINTS
I've seen this crossword clue in The Daily Telegraph
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More clues leading to the result ACQUAINTS
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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 ACQUAINTS mean?
ACQUAINTS verb- (followed by with) To furnish or give experimental knowledge of; to make (one) to know; to make familiar.
- (followed by of or that) To communicate notice to; to inform; to make cognizant.
- To familiarize; to accustom.