She has a consuming interest in the opposite sex (5,5)

I believe the answer is:

black widow

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'she' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's a link between them I don't understand?

I can't explain the rest of the clue.

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(Other definitions for black widow that I've seen before include "American spider, the female of which eats her mate" , "Poisonous spider" , "Venomous American spider" , "Web developer" , "venomous creature" .)

I've seen this clue in the Evening Standard.

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