Item that's baked without sugar finally rubbish (3)
I believe the answer is:
tat
'rubbish' is the definition.
(tat can mean rubbish or poor-quality material)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for tat that I've seen before include "Worthless goods" , "Shoddy articles" , "piece of needlework?" , "Tawdry stuff" , "Tasteless articles" .)