Articles right behind part of flower (6)
I believe the answer is:
anther
'part of flower' is the definition.
('anther' is part of 'flower')
'articles right behind' is the wordplay.
'articles' becomes 'an the' (indefinite article 'an', definite article 'the').
'right' becomes 'r' (common abbreviation).
'behind' says to put letters next to each other.
'anthe'+'r'='ANTHER'
(Other definitions for anther that I've seen before include "produces pollen" , "Pollen-containing flower part found in Tehran" , "Part of a plant that contains pollen" , "(Actors) leave stage" , "Pollen part of flower" .)