Poem also written about storm (3,5)
I believe the answer is:
the raven
'poem' is the definition.
(poem by Edgar Allan Poe)
'also written about storm' is the wordplay.
'also' becomes 'then' ('then' means something else also happened).
'written about' is an insertion indicator.
'storm' becomes 'rave' (I've seen this in another clue).
'then' placed around 'rave' is 'THE RAVEN'.
(Other definitions for the raven that I've seen before include "Poem" , "Literary bird" .)