Top sides change places (8)
I believe the answer is:
deposits
'places' is the definition.
(depositing is a kind of placing)
'top sides change' is the wordplay.
'top sides' becomes 'topsides' ('topside' can be a synonym of 'top side').
'change' is an anagram indicator.
'topsides' is an anagram of 'DEPOSITS'.
(Other definitions for deposits that I've seen before include "Lays down-inbank account?" , "Matter laid down or money in the bank" , "Monies left in a bank" , "Lodges in bank" , "Despots I find making bank lodgements" .)