Or puts up with lethargy (6)
I believe the answer is:
stupor
'lethargy' is the definition.
(I've seen this before)
'or puts up' is the wordplay.
'up' indicates an anagram (letters get chucked up).
'or'+'puts'='orputs'
'orputs' with letters rearranged gives 'STUPOR'.
'with' acts as a link.
(Other definitions for stupor that I've seen before include "State of senselessness" , "Dazed condition as from drink or drugs" , "that'll send you to sleep" , "State of lethargy" , "Proust found in dazed condition" .)