Breaking plates for bread, say (6)
I believe the answer is:
staple
'bread say' is the definition.
(I know that bread is a type of staple)
'breaking plates' is the wordplay.
'breaking' is an anagram indicator.
'plates' anagrammed gives 'STAPLE'.
'for' acts as a link.
(Other definitions for staple that I've seen before include "Fundamental" , "(Of food) necessary and important" , "Basic element" , "Leading commodity" , "Secure" .)