Produce confused teenager (8)
I believe the answer is:
generate
'produce' is the definition.
(generating is a kind of producing)
'confused teenager' is the wordplay.
'confused' indicates an anagram.
'teenager' with letters rearranged gives 'GENERATE'.
(Other definitions for generate that I've seen before include "evolve" , "Give rise to" , "Create (power)" , "Teenager (anag) - green tea (anag)" , "Produce (energy, etc)" .)