Sluggishness (6)
'sluggishness' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for torpor that I've seen before include "Numbness - inactivity" , "State of sluggish somnolence" , "State of lethargy or sluggishness" , "Inactive and sluggish condition" , "Apathetic state" .)
(Other definitions for tardiness that I've seen before include "Being behind quality" , "Unpunctuality" , "being a little late" , "Lateness" , "No quality in fast food" .)