Credit with hidden charge produces depression (6)
I believe the answer is:
crater
'depression' is the definition.
(I know that crater is a type of crater)
'credit with hidden charge' is the wordplay.
'credit' becomes 'cr' (abbreviation).
'with hidden' indicates putting letters inside (inserted letters are hidden inside).
'charge' becomes 'rate' (rate is a kind of charge).
'cr' going around 'rate' is 'CRATER'.
'produces' is the link.
(Other definitions for crater that I've seen before include "Large bowl-shaped hollow" , "Volcanic depression" , "Cavity formed by explosion" , "Hole of volcano or bomb" , "Bowl-shaped hole in the ground" .)