Future therapist's major, for short (5)
I believe the answer is:
psych
'future therapist's major for short' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for psych that I've seen before include "Mind doctor (colloquial abbreviation)" , "Intimidate someone by making him feel uneasy" , "Stimulate" , "To subject to mind games" .)