Cryptic crossword clue
By luck, lab recreated molecule

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

I've seen this crossword clue in Independent
B
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C
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A
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Buddy explains!

The straight part
We know that "molecule" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case molecule = buckyball.
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 BUCKYBALL mean?

BUCKYBALL noun
  1. A buckminsterfullerene molecule (C60).
  2. (by extension) The most common types of spheroidal fullerenes, C60 and C70 usually, with additionally C72 and C76 also included at times.
  3. (by extension) Any spheroidal fullerene, from C20 on upwards.

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