Broad's day - Anderson finally overshadowed is puffing and blowing (6)
I believe the answer is:
winded
'broad's' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for winded that I've seen before include "Rendered out of breath" , "short of breath" , "Out of puff, breathless" .)