No longer tense (4)
I believe the answer is:
past
I believe this clue is a double definition.
'no longer' is the first definition.
'tense' is the second definition.
(I know that past is a type of tense)
(Other definitions for past that I've seen before include "historical times" , "A person's earlier life history" , "Bygone" , "Days gone by" , "over and done with" .)