The term 'Black Widow' refers to a species of SPIDER, the female of which is known for consuming its mate after mating. The crossword solutions for this term are 'SPIDER' (6 letters), 'Theresa' (7 letters), 'TOXINS' (6 letters), and 'Cannibals' (9 letters). SPIDER is an obvious reference to the species, while Theresa is likely a reference to the Black Widow SPIDER's scientific name, Latrodectus Theresa. TOXINS refers to the venomous nature of the Black Widow SPIDER, and Cannibals is a reference to the female's tendency to consume its mate.