Sent, it's said, a little money (4)
I believe the answer is:
cent
'a little money' is the definition.
(I've seen this before)
'sent it's said' is the wordplay.
'it's said' indicates a 'sounds like' (homophone) clue.
'sent' is a homophone of 'CENT'.
(Other definitions for cent that I've seen before include "One 100th of a dollar" , "Part of a dollar" , "change from Colorado!" , "One hundredth of a dollar" , "Tiny coin" .)