Bit of money delivered, by the sound of it? (4)
I believe the answer is:
cent
'bit of money' is the definition.
'delivered by the sound of it?' is the wordplay.
'delivered' becomes 'sent' (I've seen this in another clue).
'by the sound of it?' shows a homophone (sound like).
'sent' is a homophone of 'CENT'.
(Other definitions for cent that I've seen before include "One tenth of a dime" , "Small change" , "One-hundredth of the basic monetary unit" , "One 100th of a dollar" , "One hundredth of a euro" .)