Such charges go deep (5)
I believe the answer is:
depth
'deep' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for depth that I've seen before include "Thoroughness" , "Distance downwards" , "Intensity (of emotion)" , "Deepness" , "Distance from the surface to the bottom" .)