Bank charge right to go up (4)
I believe the answer is:
reef
'bank' is the definition.
(thesaurus)
'charge right to go up' is the wordplay.
'charge' becomes 'fee' (fee is a kind of charge**).
'right' becomes 'r' (common abbreviation).
'to go up' says the letters should be written in reverse (I've seen 'goes up' mean this).
'fee'+'r'='feer'
'feer' back-to-front is 'REEF'.
(Other definitions for reef that I've seen before include "Submerged rocks" , "Underwater ridge or kind of knot" , "marine hazard" , "Underwater obstruction" , "key" .)