Crossword Genius

Fighting power that's corrupt (4)

Ross

I believe the answer is:

warp

'corrupt' is the definition.
(thesaurus)

'fighting power' is the wordplay.
'fighting' becomes 'war'.
'power' becomes 'p'.
'war'+'p'='WARP'

'that's' acts as a link.

(Other definitions for warp that I've seen before include "Distort as wood may from heat" , "Pervert - distort" , "Abnormality in character" , "Go out of shape" , "Become twisted" .)

I've seen this clue in The Telegraph.
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