Crossword Genius

Unusual blue lava worth a lot (8)

Ross

I believe the answer is:

valuable

'worth a lot' is the definition.
(I've seen this before)

'unusual blue lava' is the wordplay.
'unusual' indicates an anagram.
'blue'+'lava'='bluelava'
'bluelava' is an anagram of 'VALUABLE'.

(Other definitions for valuable that I've seen before include "Blue lava may be worth money" , "Of great importance or worth" , "Of considerable worth" , "Expensive, prized" , "Worth a lot, unlike 33 Across" .)

I've seen this clue in The Telegraph.
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