Checkers double-deckers (5)
I believe the answer is:
kings
'checkers double-deckers' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for kings that I've seen before include "Monarchs" , "Name of two Old Testament books" , "Honours" , "Not subjects among those" , "Two book of the Old Testament" .)