Crossword Genius

Heroism, surprisingly addictive (7)

Ross

I believe the answer is:

moreish

'addictive' is the definition.
(I've seen this before)

'heroism surprisingly' is the wordplay.
'surprisingly' is an anagram indicator (a surprising ordering of the letters).
'heroism' anagrammed gives 'MOREISH'.

(Another definition for moreish that I've seen is " addictive".)

I've seen this clue in The Telegraph.
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