Adult with energy, energy in abundance (1,4)
I believe the answer is:
a gogo
'in abundance' is the definition.
(I've seen this before)
'adult with energy energy' is the wordplay.
'adult with' becomes 'a' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'energy' becomes 'go' (I've seen this in other clues).
'energy' becomes 'go' (I've seen this in other clues).
'a'+'go'+'go'='A GOGO'
Can you help me to learn more?
(Other definitions for a gogo that I've seen before include "Small bell" , "stacks" , "In abundance (informal)" , "to one's heart's content" , "in large numbers" .)