Cryptic crossword clue
Alloy containing gold spy finally replaced by uranium 6

The most common and most likely answer to this crossword clue is the 6 letter word ORMOLU

I've seen this crossword clue in The Daily Telegraph
O
R
M
O
L
U


Buddy explains!

The straight part
We know that "Alloy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case alloy = ormolu.
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 ORMOLU mean?

ORMOLU noun
  1. Golden or gilded brass or bronze used for decorative purposes.
ORMOLU verb
  1. To decorate with gilded ormolu articles.
ORMOLU adjective
  1. Made from golden or gilded brass or bronze.

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