The most common and most likely answer to this crossword clue is the 14 letter word ORCHESTRATIONS
I've seen this crossword clue in The Sunday Telegraph
O
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Buddy explains!
The straight part
We know that "Harmoniously settled scores" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case harmoniously settled scores = orchestrations.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 ORCHESTRATIONS mean?
ORCHESTRATIONS noun- The arrangement of music for performance by an orchestra.
- A composition that has been orchestrated.
- (by extension) The control of diverse elements.
- (by extension) The automated arrangement, coordination, and management of computer systems, middleware, and services.