Lover is aged, ancient (6)
I believe the answer is:
isolde
'lover' is the definition.
(I've seen this before)
'is aged ancient' is the wordplay.
'aged' becomes 'old' ('old' can be similar in meaning to 'aged').
'ancient' becomes 'e' (I can't justify this - if you can you should give a lot more credence to this answer).
'is'+'old'+'e'='ISOLDE'
Can you help me to learn more?
(Other definitions for isolde that I've seen before include "for Tristram" , "Operatic heroine" , "Tristan's lover, sadly soiled" , "Soiled like Tristan's lover" , "Arthurian queen" .)