Crossword Genius

Insect, black, missing wings

Ross

I believe the answer is:

lac

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This clue could be a double definition.

'insect' is the first definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.

'black missing wings' is the second definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.

Can you help me to learn more?

(Other definitions for lac that I've seen before include "Insect's resinous secretion" , "Stated need" , "Resinous material" , "insects secrete this" , "Ingredient of varnish" .)

I've seen this clue in The Daily Mail.
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