Note risk in pieces not working (2,6)
I believe the answer is:
on strike
'not working' is the definition.
(I've seen this in another clue)
'note risk in pieces' is the wordplay.
'in pieces' is an anagram indicator.
'note'+'risk'='noterisk'
'noterisk' anagrammed gives 'ON STRIKE'.
(Other definitions for on strike that I've seen before include "Refusing to work" , "Taking industrial action" , "Facing a ball" , "Involved in industrial action" .)