Cover of Vogue inverted flower (8)
I believe the answer is:
daffodil
'flower' is the definition.
(I've seen this before)
'cover of vogue inverted' is the wordplay.
'cover' becomes 'lid' (lid is a kind of cover).
'vogue' becomes 'fad' (fad is a kind of vogue).
'inverted' says the letters should be written backwards.
'lid'+'of'+'fad'='lidoffad'
'lidoffad' written backwards gives 'DAFFODIL'.
(Other definitions for daffodil that I've seen before include "Welsh emblem" , "Yellow narcissus" , "Yellow spring flower beloved of Wordsworth" , "Plant of the genus Narcissus" , "Floral emblem of Wales" .)