Listless (9)
'listless' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for lethargic that I've seen before include "without energy" , "reluctant to move" , "Apathetic, lacking energy" , "The garlic (anag.)" , "Lackadaisical" .)
'listless' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for languid that I've seen before include "lacking in energy" , "Lethargic" , "Weak from illness or fatigue" , "Spiritless" , "Listless (7)" .)