Tragically, new tag is not poetic (7)
I believe the answer is:
lyrical
'poetic' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for lyrical that I've seen before include "We may wax this" , "Using poetic language, wax thus (7)" , "Highly enthusiastic" , "Song-like, imaginative or expressive" , "Expressing deep emotion" .)