Lyrical fresh topic around mid-September (6)
I believe the answer is:
poetic
'lyrical' is the definition.
(I've seen this before)
'fresh topic around mid-september' is the wordplay.
'fresh' indicates anagramming the letters (a fresh re-ordering of the letters).
'around' indicates putting letters inside.
'mid' says to take the centre (mid- can mean the middle of something).
'september' becomes 'sep' (short for September).
The centre of 'sep' is 'e'.
'topic' with letters rearranged gives 'potic'.
'potic' enclosing 'e' is 'POETIC'.
(Other definitions for poetic that I've seen before include "Like a 16" , "lines?" , "Flowery" , "Concerning metrical writing" , "Lyrical like verse" .)