Each experience has it (3)
I believe the answer is:
per
'each' is the definition.
('per' can mean for each)
'experience has it' is the wordplay.
'has it' says the answer is hidden in the clue.
'PER' is hidden within 'experience'.
(Other definitions for per that I've seen before include "For each or every" , "Preposition indicating by means of" , "Preposition meaning for each" , "According to" .)