Lethargic, languid (8)
I believe the answer is:
listless
I believe this clue is a double definition.
'lethargic' is the first definition.
(similar in meaning)
'languid' is the second definition.
(synonyms)
(Other definitions for listless that I've seen before include "Devoid of spirit or energy" , "Short of energy (and ill-equipped for shopping?)" , "Devoid of energy or interest" , "'Lethargic, spiritless (8)'" , "Showing no enthusiasm, torpid" .)