Cryptic crossword clue
Endless impertinence by group showing enthusiasm 8

The most common and most likely answer to this crossword clue is the 8 letter word CHEERING

C
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Buddy explains!

The straight part
We know that "showing enthusiasm" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case showing enthusiasm = cheering.
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 CHEERING mean?

CHEERING verb
  1. To gladden; to make cheerful; often with up.
  2. To infuse life, courage, animation, or hope, into; to inspirit; to solace or comfort.
  3. To applaud or encourage with cheers or shouts.
CHEERING noun
  1. A cheer.

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