In bayou there's a stripling (5)
I believe the answer is:
youth
'stripling' is the definition.
(I've seen this in another clue)
'in bayou there's a' is the wordplay.
'in' says the answer is hidden in the clue.
'YOUTH' is hidden within 'bayou theres a'.
(Other definitions for youth that I've seen before include "Salad days" , "7" , "Freshness maybe" , "Young people" , "Early days" .)