Crossword Genius

Remarkable theory won’t break down (10)

Ross

I believe the answer is:

noteworthy

'remarkable' is the definition.
('noteworthy' can be a synonym of 'remarkable')

'theory wont break down' is the wordplay.
'break down' indicates an anagram.
'theory'+'wont'='theorywont'
'theorywont' is an anagram of 'NOTEWORTHY'.

(Other definitions for noteworthy that I've seen before include "important" , "Interesting, significant" , "Signal" , "Of significance" .)

I've seen this clue in The Telegraph.
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