Crossword Genius

Vast extent of land area is lost without uranium (7)

Ross

I believe the answer is:

eurasia

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'vast extent of land' is the definition.
I can't tell whether this defines the answer.

'area is lost without uranium' is the wordplay.
'lost' indicates an anagram.
'without' indicates putting letters inside ('without' can be similar in meaning to 'outside').
'uranium' becomes 'U' (U is the chemical symbol for uranium).
'area'+'is'='areais'
'areais' with letters rearranged gives 'erasia'.
'erasia' going around 'u' is 'EURASIA'.

Can you help me to learn more?

(Other definitions for eurasia that I've seen before include "Combined continent" , "Unbroken landmass bearing two continents" , "Two continents considered as one" , "Huge area" , "Supercontinent" .)

I've seen this clue in The Guardian.
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