The elder made king of England (8)
I believe the answer is:
ethelred
'king of england' is the definition.
(I've seen this before)
'the elder made' is the wordplay.
'made' indicates an anagram.
'the'+'elder'='theelder'
'theelder' anagrammed gives 'ETHELRED'.
(Other definitions for ethelred that I've seen before include "King of England" , "Old king" , "Unready monarch" , "Early English king" , "King nicknamed the Unready" .)