Credit note with me for review: this locates hidden charges (4,8)
I believe the answer is:
mine detector
'this locates hidden charges' is the definition.
The definition suggests a singular noun which matches the answer.
'credit note with me for review' is the wordplay.
'with' is a charade indicator (letters next to each other).
'for review' indicates anagramming the letters.
'credit'+'note'='creditnote'
'creditnote' put after 'me' is 'mecreditnote'.
'mecreditnote' with letters rearranged gives 'MINE-DETECTOR'.
Can you help me to learn more?
(Other definitions for mine detector that I've seen before include "Device finding concealed explosives" , "Device for locating explosives" , "Explosive locator" .)