Beginning to love one English fairy tale (3)
I believe the answer is:
lie
'fairy tale' is the definition.
(thesaurus)
'beginning to love one english' is the wordplay.
'beginning to' says to take the initial letters.
'one' becomes 'i' (Roman numeral).
'english' becomes 'e' (abbreviation).
The first letter of 'love' is 'l'.
'l'+'i'+'e'='LIE'
(Other definitions for lie that I've seen before include "habitat for animal or bird" , "Couch" , "Fib in alienation" , "False statement" , "situation" .)