These miners supply bits and pieces (11)
I believe the answer is:
smithereens
'bits and pieces' is the definition.
(smithereens means very small pieces)
'these miners supply' is the wordplay.
'supply' is an anagram indicator (in a supple way).
'these'+'miners'='theseminers'
'theseminers' with letters rearranged gives 'SMITHEREENS'.
(Other definitions for smithereens that I've seen before include "Small fragments of the whole" , "Tiny pieces" , "Small fragments of something smashed" , "broken bits?" , "Shattered fragments" .)