Overstimulated PR person (5)
I believe the answer is:
hyper
'overstimulated' is the definition.
(I've seen this before)
'pr person' is the wordplay.
'pr' becomes 'hy' (I am not sure about this - if you are sure you should believe this answer much more).
'person' becomes 'per' (abbreviation).
'hy'+'per'='HYPER'
Can you help me to learn more?
(Other definitions for hyper that I've seen before include "Prefix meaning excessively, perhaps active" , "Over-stimulated" , "extraordinarily energetic" , "Overexcited" , "More excitable than normal" .)