The most common and most likely answer to this crossword clue is the 12 letter word GEMEINSCHAFT
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Buddy explains!
The straight part
We know that "Close social group" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case close social group = gemeinschaft.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 GEMEINSCHAFT mean?
GEMEINSCHAFT noun- An association or group of individuals sharing common beliefs, attitudes, and tastes; a fellowship.
- A society or group characterized by a strong sense of common identity, personal relationships, and attachments to various concerns.