Utopian novel italicised (10)
I believe the answer is:
idealistic
'utopian' is the definition.
(similar in meaning)
'novel italicised' is the wordplay.
'novel' indicates an anagram.
'italicised' anagrammed gives 'IDEALISTIC'.
(Other definitions for idealistic that I've seen before include "Visionary" , "High-minded - italicised (anag)" , "Impracticable" , "Seeking the best" , "Striving for perfection" .)