Vermilion-coloured crab wandering around island, attracting news article (8)
I believe the answer is:
Here is my best explanation:
'vermilion' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
(Other definitions for cinnabar that I've seen before include "Red mineral", "Heavy red mineral containing mercury", "Bright red mineral containing mercury", "Mineral", "Red mercury sulphide" and "Brian can make vermilion pigment".)