Cryptic crossword clue
Splendid eastern sail to windward coming up, man 9

The most common and most likely answer to this crossword clue is the 9 letter word EFFULGENT

I've seen this crossword clue in The Times
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The straight part
We know that "Splendid" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case splendid = effulgent.
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 EFFULGENT mean?

EFFULGENT adjective
  1. Radiant, resplendent, shining.

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