Tears into small pieces (6)
I believe the answer is:
shreds
'tears into small pieces' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for shreds that I've seen before include "Tears into strips" , "Torn pieces and tatters" , "Tears into tiny pieces" , "Tears into small pieces" , "Small pieces, maybe of bread" .)