Time's 2012 Person of the Year (5)
I believe the answer is:
obama
'time's 2012 person of the year' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for obama that I've seen before include "Leading man" , "44th US President" , "Trump's predecessor" , "President awarded the 2009 Nobel Peace Prize" , "in the White House" .)