Wig historically worn by a peer roaming round the kingdom (6)
I believe the answer is:
peruke
'wig' is the definition.
(I know that peruke is a type of wig)
'peer roaming round the kingdom' is the wordplay.
'roaming' indicates anagramming the letters.
'round' indicates putting letters inside.
'the kingdom' becomes 'UK' (UK is an example).
'peer' anagrammed gives 'pere'.
'pere' enclosing 'uk' is 'PERUKE'.
'historically worn by a' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for peruke that I've seen before include "18th-century wig" , "Periwig" , "Ancient wig" , "Old fashionable wig" .)