Steep charge imposed on son at university (8)
I believe the answer is:
saturate
'steep charge' is the definition.
'saturate' can be an answer for 'charge' (thesaurus). I am not certain of the 'steep' bit.
'imposed on son at university' is the wordplay.
'imposed' becomes 'rate' (I am not sure about this - if you are sure you should believe this answer much more).
'on' means one lot of letters go next to another.
'son' becomes 's' (genealogical abbreviation for son).
'university' becomes 'U' (abbreviation as in UMass).
's'+'at'+'u'='satu'
'rate' put after 'satu' is 'SATURATE'.
Can you help me to learn more?
(Other definitions for saturate that I've seen before include "flood" , "steep" , "Oversupply" , "Soak completely" , "Use attar to make thoroughly wet" .)