Cryptic crossword clue
Swaggering crooner, one with passionate desires hidden 10

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

I've seen this crossword clue in The Guardian
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Buddy explains!

The straight part
We know that "Swaggering" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case swaggering = blustering.
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 BLUSTERING mean?

BLUSTERING verb
  1. To speak or protest loudly.
  2. To act or speak in an unduly threatening manner.
  3. To blow in strong or sudden gusts.
BLUSTERING noun
  1. A noisy blowing, as of a blast of wind.
  2. Swaggering; braggartry; noisy pretension.
BLUSTERING adjective
  1. Engaged in or involving the process of blustering, speaking or protesting loudly.
  2. Pompous or arrogant in one's speech or bearing.
  3. Very windy; (of wind) blowing very strongly, blustery.

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