Letter’s opening rewritten racily, like a poem? (7)
I believe the answer is:
lyrical
'like a poem?' is the definition.
I can't judge whether this definition defines the answer.
'letter's opening rewritten racily' is the wordplay.
'opening' indicates taking the first letters.
'rewritten' indicates anagramming the letters.
The initial letter of 'letters' is 'l'.
'racily' is an anagram of 'yrical'.
'l'+'yrical'='LYRICAL'
Can you help me to learn more?
(Other definitions for lyrical that I've seen before include "carried away" , "Song-like, imaginative or expressive" , "Using poetic language, wax thus (7)" , "In poetic words, song-like" , "We may wax this" .)