Sign of the zodiac represented by a crab (6)

I believe the answer is:

cancer

(Other definitions for cancer that I've seen before include "Crab star sign" , "A Tropic or a malignant disease" , "Zodiac sign - tumour" , "Sign of the Crab, or a Tropic" , "Malignant growth and sign of the zodiac" .)

I've seen this clue in The Mirror.

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