Cryptic crossword clue
Raiments of monarch seized by retreating highlanders 9

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

I've seen this crossword clue in Financial Times
S
T
O
C
K
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S

Buddy explains!

The straight part
We know that "Raiments" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case raiments = stockings.
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 STOCKINGS mean?

STOCKINGS noun
  1. A soft garment, usually knit or woven, worn on the foot and lower leg under shoes or other footwear.
  2. A broad ring of a different fur colour on the lower part of the leg of a quadruped.
  3. A knitted hood of cotton thread which is eventually converted by a special process into an incandescent mantle for gas lighting.

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