Some into occult also (3)
I believe the answer is:
too
'also' is the definition.
(I know that also can be written as too)
'some into occult' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'TOO' can be found hidden inside 'into occult'.
(Other definitions for too that I've seen before include "Likewise" , "Moreover, in addition" , "As well, also" , "On top - also" , "Furthermore" .)