Savings plan initials (3)
I believe the answer is:
ira
'savings plan initials' 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 "nationalists" , "Illegal organisation, in short" , "George 13 down's brother" , "Gershwin, say" , "Militant republicans" .)