A piece, when put together, found in tea chest (4)
I believe the answer is:
each
'a piece when put together' is the definition.
I can't judge whether this definition defines the answer.
'in tea chest' is the wordplay.
'in' says the answer is hidden in the clue.
'EACH' is hidden within 'tea chest'.
'found' acts as a link.
Can you help me to learn more?
(Other definitions for each that I've seen before include "This way for a place" , "every individual" , "Per capita, apiece" , "Per person" , "Everyone separately" .)