Continue a poem in translation, the start of a tale (4,4,1,4)
I believe the answer is:
once upon a time
'start of a tale' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'continue a poem in translation' is the wordplay.
'in translation' indicates an anagram (I've seen this in other clues).
'continue'+'a'+'poem'='continueapoem'
'continueapoem' anagrammed gives 'ONCE UPON A TIME'.
'the' acts as a link.
Can you help me to learn more?
(Other definitions for once upon a time that I've seen before include "Tale opener?" , "Start of fairy tale" , "Fairytale beginning" , "Start of a fairytale" , "Fairytale opening" .)