Such a charge will really soak you (5)
I believe the answer is:
'soak you' is the definition.
'steep' can be an answer for 'soak' (steeping is a kind of soaking). I am not certain of the 'you' bit.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for steep that I've seen before include "not reasonable" , "Rising sharply" , "Without the bounds of moderation" , "Stiff - thoroughly wet" , "Precipitous - exorbitant" .)