Truss at last out of mind playing a blinder (8)
I believe the answer is:
stardust
'truss' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for stardust that I've seen before include "In Woodstock we are this" , "Imaginary particles blinding someone to reality" , "that could blind one to reality" , "Singer < and song" .)