Cold residue shows places where money is kept (4,9)

I believe the answer is:

cash registers

'places where money is kept' is the definition.
(cash registers hold bits of cash)

'cold residue shows' is the wordplay.
'cold' becomes 'c' (eg on taps).
'residue' becomes 'ash' (ash is a kind of residue).
'shows' becomes 'registers' (register can mean to show or display).
'c'+'ash'+'registers'='CASH REGISTERS'

(Another definition for cash registers that I've seen is " Shop tills".)

I've seen this clue in The Telegraph.

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