Monarchs (5)
'monarchs' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rulers that I've seen before include "Sovereigns and marked sticks" , "Drawing sticks or governors" , "Measuring sticks" , "Those in power" , "Sovereigns etc" .)
'monarchs' is the definition.
(king is a kind of monarch)
This is all the clue.
(Other definitions for kings that I've seen before include "Leaders" , "Book (or two) of the Bible" , "Two-part book" , "College etc of royal foundation" , "feature of 21/23 [NATIVITY SCENE]" .)
'monarchs' is the definition.
('crowned head' can be a synonym of 'monarch')
This is all the clue.
(Another definition for crowned heads that I've seen is " Monarchs".)