Cryptic crossword clue
Repeat courses concerning green students 10

The most common and most likely answer to this crossword clue is the 10 letter word REFRESHERS

I've seen this crossword clue in Independent
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Buddy explains!

The straight part
We know that "Repeat courses" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case repeat courses = refreshers.
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 REFRESHERS mean?

REFRESHERS noun
  1. Something that refreshes.
  2. A review to refresh or renew knowledge.
  3. A fee paid to counsel to continue with a case, especially one that was adjourned.

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