Cryptic crossword clue
Nationals entertained by particular gent in Eswatini 10

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

I've seen this crossword clue in The Sunday Telegraph
A
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Buddy explains!

The straight part
We know that "Nationals" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case nationals = argentines.
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 ARGENTINES mean?

ARGENTINES noun
  1. Any osmeriform fish of the genus Argentina, especially the European argentine, Argentina sphyraena.
  2. A siliceous variety of calcite, or lime carbonate, having a silvery-white, pearly lustre, and a waving or curved lamellar structure.
  3. White metal coated with silver

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