Literary princess lied so deviously (6)
I believe the answer is:
isolde
'literary princess' is the definition.
'Isolde' can be an answer for 'princess' (legendary princess). I'm not certain of the 'literary' bit.
'lied so deviously' is the wordplay.
'deviously' indicates anagramming the letters (I've seen this in other clues).
'lied'+'so'='liedso'
'liedso' is an anagram of 'ISOLDE'.
Can you help me to learn more?
(Other definitions for isolde that I've seen before include "Tristan's beloved" , "Irish princess" , "Arthurian queen" , "heroine (sic)" , "Soiled like Tristan's lover" .)