On retirement, provided with very limited amount of money (5)
I believe the answer is:
fiver
'amount of money' is the definition.
'fiver' can be an answer for 'money' (I've seen this before). I am not sure about the 'amount of' bit.
'on retirement provided with very limited' is the wordplay.
'on retirement' says the letters should be written backwards (retire can mean to go back).
'provided' becomes 'if' (eg 'provided it's sunny' means 'if it's sunny').
'with' means one lot of letters go next to another.
'limited' means to remove the last letter (a limited or incomplete form of the word).
'if' backwards is 'fi'.
'very' with its last letter removed is 'ver'.
'fi'+'ver'='FIVER'
Can you help me to learn more?
(Other definitions for fiver that I've seen before include "Banknote (informal)" , "money" , "Half a tenner" , "Where to see portrait of Elizabeth Fry" , "Smallest English note" .)