The most common and most likely answer to this crossword clue is the 6 letter word SHARDS
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The straight part
We know that "Broken pieces" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case broken pieces = shards.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SHARDS mean?
SHARDS noun- A piece of broken glass or pottery, especially one found in an archaeological dig.
- (by extension) A piece of material, especially rock and similar materials, reminding of a broken piece of glass or pottery.
- A tough scale, sheath, or shell; especially an elytron of a beetle.
- An instance of an MMORPG that is one of several independent and structurally identical virtual worlds, none of which has so many players as to exhaust a system's resources.
- A component of a sharded distributed database.
- (singular or plural) A piece of crystal methamphetamine.
- To fall apart into shards, usually as the result of impact or explosion.
- To break (something) into shards.
- To divide (an MMORPG) into several shards, or to establish a shard of one.