The most common and most likely answer to this crossword clue is the 6 letter word AWNING
I've seen this crossword clue in The Sunday Telegraph
A
W
N
I
N
G
More clues leading to the result AWNING
- Dawn, in Ghana, holds sun shade
- Beginning putting out day’s sunshade
- A number in camp getting shelter
- Crawling fellow leaves cover outdoors
- A shade partly drawn in good weather
- In one part of house, install new canopy
- 12 heading off to find shade
- Shelter beginning to be needed with day fading
- Trading unopened sunshade
- Shelter in decline with moves to the right
Buddy explains!

The straight part
We know that "Canopy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case canopy = awning.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does AWNING mean?
AWNING noun- A rooflike cover, usually of canvas, extended over or before any place as a shelter from the sun, rain, or wind.
- That part of the poop deck which is continued forward beyond the bulkhead of the cabin.