Pottery fragment (5)
I believe the answer is:
shard
'pottery fragment' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for shard that I've seen before include "Broken piece of a brittle artefact" , "Sliver of glass, etc" , "Bit of glass" , "Scrap of pottery" , "Broken fragment" .)