Rollover target (3)
I believe the answer is:
ira
'rollover target' 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 "George Gershwin's older brother, the lyricist" , "Gershwin, say" , "Militant Irish nationalist organisation" , "Militant republicans" , "terrorists" .)