Easy decision (2-7)
I believe the answer is:
no-brainer
'easy decision' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for no-brainer that I've seen before include "Something requiring no mental thought" , "Something involving little or no mental effort" , "That which must be done, obviously" , "Something needing little mental effort" , "Trivial problem" .)