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'm unsure of the 'amount of' bit.
'on retirement provided with very limited' is the wordplay.
'on retirement' says the letters should be written in reverse (retire can mean to go back).
'provided' becomes 'if' (eg 'provided it's sunny' means 'if it's sunny').
'with' is a charade indicator (letters next to each other).
'limited' means to remove the last letter (a limited or incomplete form of the word).
'if' written backwards gives 'fi'.
'very' with its last letter taken away 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" .)