Fruit requiring no introduction for everyone (4)
I believe the answer is:
each
'everyone' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for each that I've seen before include "every one individually" , "Every one of a number" , "Every single one, person or thing" , "Per capita, apiece" , "every individual" .)