Is posted off with part payments (8)
I believe the answer is:
deposits
'part payments' is the definition.
'deposits' can be an answer for 'payments' (deposit is a kind of payment). I am not sure about the 'part' bit.
'is posted off' is the wordplay.
'off' is an anagram indicator.
'is'+'posted'='isposted'
'isposted' anagrammed gives 'DEPOSITS'.
'with' acts as a link.
Can you help me to learn more?
(Other definitions for deposits that I've seen before include "Lodgements or down payments" , "Lays down-inbank account?" , "Lodges in bank" , "Monies left in a bank" , "Despots I find making bank lodgements" .)