The most common and most likely answer to this crossword clue is the 8 letter word RESIDUES
I've seen this crossword clue in Financial Times
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More clues leading to the result RESIDUES
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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 RESIDUES mean?
RESIDUES noun- Whatever remains after something else has been removed.
- The substance that remains after evaporation, distillation, filtration or any similar process.
- A molecule that is released from a polymer after bonds between neighbouring monomers are broken, such as an amino acid in a polypeptide chain.
- Whatever property or effects are left in an estate after payment of all debts, other charges and deduction of what is specifically bequeathed by the testator.
- A form of complex number, proportional to the contour integral of a meromorphic function along a path enclosing one of its singularities.