Spain's historic beard singeing centre (5)
I believe the answer is:
cadiz
'centre' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Maybe they are linked in a way I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for cadiz that I've seen before include "SW Spanish port" , "Old Spanish port" , "Southwest Spanish port" , "Andalusian port" , "European port" .)