The most common and most likely answer to this crossword clue is the 10 letter word TIGHT-KNIT
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Buddy explains!
The straight part
We know that "intimate" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case intimate = tight-knit.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 TIGHT-KNIT mean?
TIGHT-KNIT adjective- Strongly pulled together, tightly knit.