Savings plan option (3)
I believe the answer is:
ira
'savings plan option' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ira that I've seen before include "Illegal organisation, in short" , "Gershwin, say" , "Brother of George Gershwin" , "Militant republicans" , "George 13 down's brother" .)