Name of six British kings (6)
I believe the answer is:
'name of six british kings' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for george that I've seen before include "The G in G. B. Shaw" , "Ira's composer brother" , "Farming monarch" , "Man's name" , "one in 3 the 12 30 [DROP the DEAD DONKEY]" .)