Cryptic crossword clue
Case copper makes for non-combatant organisation 5,5

The most common and most likely answer to this crossword clue is the 5 plus 5 letter word PEACE CORPS

I've seen this crossword clue in The Guardian
P
E
A
C
E
C
O
R
P
S

Buddy explains!

The straight part
We know that "non-combatant organisation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case non-combatant organisation = peace corps.
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.

Crossword Answer definitions

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