Crossword Genius

This is radioactive waste not beginning to eat a metal (8)


I believe the answer is:


'this is radioactive' is the definition.
(I know that astatine is radioactive)

'waste not beginning to eat a metal' is the wordplay.
'not beginning' means to remove the first letter.
'to eat' indicates putting letters inside.
'metal' becomes 'tin' (tin is a kind of metal).
'waste' with its first letter taken away is 'aste'.
'aste' enclosing 'atin' is 'ASTATINE'.

(Other definitions for astatine that I've seen before include "radioactive material" , "Chemical element At" , "Radioactive element" , "Atomic number 85" , "Rare element" .)

I've seen this clue in The Telegraph.
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