Hide sign of melanoma (4,6)

I believe the answer is:

skin cancer

I'm a little stuck... Click here to teach me more about this clue!

'melanoma' is the definition.
The definition and answer can be both states of affairs as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'hide sign' is the wordplay.
'hide' becomes 'skin' (a hide is an animal skin).
'sign' becomes 'Cancer' (sign of the zodiac).
'skin'+'cancer'='SKIN CANCER'

'of' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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