Subject for those who have the mind to study (10)
I believe the answer is:
psychology
'subject for those who have the mind to study' is the definition.
'psychology' can be an answer for 'subject' (psychology is a kind of subject). I am not certain of the remainder of the definition.
'subject for those who have' is the wordplay.
'subject' becomes 'ology' (ology is a kind of subject).
'for' means one lot of letters go next to another (I've seen this in other clues).
'those who have' becomes 'psych' (I can't explain this - if you can you should believe this answer much more).
'ology' after 'psych' is 'PSYCHOLOGY'.
Can you help me to learn more?
(Other definitions for psychology that I've seen before include "Jung's field" , "Science of the mind" , "Study of the mind and its functions" , "Study of human and animal behaviour" .)