I paper over stage with wings (5)
I believe the answer is:
imago
'stage with wings' is the definition.
I can't judge whether this definition defines the answer.
'i paper over' is the wordplay.
'paper' becomes 'ogam' (I am not sure about this - if you are sure you should believe this answer much more).
'over' shows that the letters should be reversed in order.
'ogam' backwards is 'mago'.
'i'+'mago'='IMAGO'
Can you help me to learn more?
(Other definitions for imago that I've seen before include "idealised figure" , "picture of important person" , "in the developmental stage" , "For example, monarch ultimately" , "Mature insect stage" .)