Metal on the roof intermittently reflecting sunlight? (8)
I believe the answer is:
flashing
'metal' is the definition.
Although both the answer and definition are adjectives, I cannot see how they can define each other.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for flashing that I've seen before include "Waterproof strip" , "Shaped metal attached to a roof for strength and weatherproofing" , "Weather-proofing strip - like a strobe" .)