Canopy becoming evident, though not opening (6)
I believe the answer is:
'canopy' is the definition.
(awning is a kind of canopy)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for awning that I've seen before include "Shelter over a window" , "Canvas sunshield" , "Canopy of canvas for shelter" , "Shop's sun shade" , "Canvas covering over, say, a patio" .)