Crossword Genius

Extremists run into bad luck (10)

Ross

I believe the answer is:

hardliners

'extremists' is the definition.
(I know this)

'run into bad luck' is the wordplay.
'run' becomes 'r' (cricket abbreviation).
'into' is an insertion indicator.
'bad luck' becomes 'hard lines' (phrase used to express commiserations or sympathy).
'r' put into 'hardlines' is 'HARDLINERS'.

(Another definition for hardliners that I've seen is " Uncompromising types".)

I've seen this clue in The Telegraph.
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