Well known for being listless? (7)
I believe the answer is:
notable
'well known' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for notable that I've seen before include "Worthy of attention, significant" , "Significant or distinguished" , "Widely known and esteemed" , "Eminent" , "Prominent" .)