Crossword Genius

Certainly not many bones shattered (2,2,5)

Ross

I believe the answer is:

by no means

'certainly not' is the definition.
(I've seen this before)

'many bones shattered' is the wordplay.
'shattered' indicates an anagram.
'many'+'bones'='manybones'
'manybones' is an anagram of 'BY NO MEANS'.

(Other definitions for by no means that I've seen before include "Definitely not" , "Forbids" , "Certainly not, not in any way" , "Without using any method" , "Certainly not, perish the thought" .)

I've seen this clue in The Telegraph.
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