Crossword Genius

Can rule out sort of energy (7)

Ross

I believe the answer is:

nuclear

'sort of energy' is the definition.
(I've seen this before)

'can rule out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'can'+'rule'='canrule'
'canrule' with letters rearranged gives 'NUCLEAR'.

(Other definitions for nuclear that I've seen before include "Relating to part of atom" , "Relating to atomic weapons" , "Relating to fission or fusion" , "Like some physics" , "Such power available" .)

I've seen this clue in The Independent.
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