Crossword Genius

No new benefit surprise (7)

Ross

I believe the answer is:

nonplus

'surprise' is the definition.
(thesaurus)

'no new benefit' is the wordplay.
'new' becomes 'n'.
'benefit' becomes 'plus' (I've seen this before).
'no'+'n'+'plus'='NONPLUS'

(Other definitions for nonplus that I've seen before include "Disconcert, confound" , "Dumbfound" , "Perplex totally" , "Floor" , "nothing if not negative?" .)

I've seen this clue in The Telegraph.
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