Verse type, or otherwise (6)
I believe the answer is:
poetry
'verse' is the definition.
(synonyms)
'type or otherwise' is the wordplay.
'otherwise' indicates anagramming the letters.
'type'+'or'='typeor'
'typeor' is an anagram of 'POETRY'.
(Other definitions for poetry that I've seen before include "Lines" , "Verse" , "'Best words in best order' (Coleridge)" , "showing lyrical quality" , "Literary genre" .)