Mythical charmer never quite dear to me (5)
I believe the answer is:
medea
'mythical charmer' is the definition.
'Medea' can be an answer for 'charmer' (thesaurus). I am not certain of the 'mythical' bit.
'never quite dear to me' is the wordplay.
I cannot quite see how this works, but
'me' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for medea that I've seen before include "Sorceress involved with Jason" , "fabulous princess" , "Sorceress who helped Jason get the Golden Fleece" , "Jason's wife who murdered their children" , "Tragedy by Euripides" .)