The most common and most likely answer to this crossword clue is the 6 letter word QUEENS
I've seen this crossword clue in The Guardian
Q
U
E
E
N
S
More clues leading to the result QUEENS
- College in Cambridge or in New York?
- Enquires about missing one rook and other pieces
- Some NY/NI university honours
- Place in New York for playing cards
- Perhaps Victoria will join son Brooklyn’s neighbour
- Cats playing cards somewhere in New York
- Division of Apple‘s most powerful men
- Tennis club‘s powerful men on board
- Powerful figures on board in New York borough
- Church edited out of sequence shot in part of New York
Buddy explains!

The straight part
We know that "other pieces" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case other pieces = queens.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 QUEENS mean?
QUEENS noun- A female monarch. Example: Queen Victoria.
- The wife or widow of a king.
- The most powerful piece, able to move any number of spaces horizontally, vertically, or diagonally.
- A playing card with the letter "Q" and the image of a queen on it, the twelfth card in a given suit.
- A red disk that is the most valuable piece in the Asian game of carom.
- A powerful or forceful female person.
- An effeminate male homosexual. (See usage notes.)
- A reproductive female animal in a hive, such as an ant, bee, termite or wasp.
- An adult female cat valued for breeding. See also tom.
- A queen olive.
- A monarch butterfly (Danaus spp., esp. Danaus gilippus).
- To make a queen.
- To act the part of a queen; to queen it.
- To promote a pawn, usually to a queen.
- To provide with a new queen.
- To be the queen of a colony.
- (BDSM, of a female) To sit on the face of (a partner) to receive oral sex.