Deposit the money sent round (8)
I believe the answer is:
sediment
'deposit' is the definition.
(synonyms)
'money sent round' is the wordplay.
'money' becomes 'dime'.
'round' means one lot of letters goes inside another.
'dime' going within 'sent' is 'SEDIMENT'.
'the' is the link.
(Other definitions for sediment that I've seen before include "Material settling out in a liquid" , "Grounds - debris" , "Send item (anag)" , "Residue" , "Dregs; deposit" .)