The average psychic? (6)
I believe the answer is:
medium
This clue is a double definition.
'the average' is the first definition.
(I've seen this in another clue)
'psychic?' is the second definition.
(I know that medium is a type of psychic)
(Other definitions for medium that I've seen before include "Intermediary between the living and the dead" , "Normal sized - agency" , "Conductor of seances - just average" , "Middle course for spiritualists" , "Spiritualist in charge of seance" .)