Unlucky for being abandoned? That's harsh! (8)
I believe the answer is:
tuneless
'that's harsh' is the definition.
(similar in meaning)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for tuneless that I've seen before include "Unmelodious" , "Like some whistling" , "harsh" , "Not melodious" , "Unpleasant to hear" .)