Crossword Genius

Rash and blot spread into eyes so half-closed (3-7)

Ross

I believe the answer is:

hot-blooded

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

'blot spread into eyes so half-closed' is the wordplay.
'spread' indicates an anagram.
'into' is an insertion indicator.
'eyes so half-closed' becomes 'hooded' (as in hooded eyes).
'blot' is an anagram of 'otbl'.
'otbl' put within 'hooded' is 'HOT-BLOODED'.

'and' is the link.

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I've seen this clue in The Guardian.
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