Hot stuff from graduates, with good intervention (5)
I believe the answer is:
magma
'hot stuff' is the definition.
(molten rock)
'graduates with good intervention' is the wordplay.
'graduates' becomes 'MA MA' (more than one holder of a Master of Arts degree).
'with' is an insertion indicator.
'good intervention' becomes 'g' (I can't justify this - if you can you should believe this answer much more).
'mama' placed around 'g' is 'MAGMA'.
'from' is the link.
(Other definitions for magma that I've seen before include "Semi-fluid material within the earth's crust" , "Hot material" , "crust's content" , "Lava" , "Molten rock in the earth's crust" .)