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 not sure about the 'amount of' bit.
'on retirement provided with very limited' is the wordplay.
'on retirement' shows that the letters should be reversed in order (retire can mean to go back).
'provided' becomes 'if' (eg 'provided it's sunny' means 'if it's sunny').
'with' says to put letters next to each other.
'limited' means to remove the last letter (a limited or incomplete form of the word).
'if' reversed gives 'fi'.
'very' with its last letter taken off 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" .)