Anxious future, maybe (5)
I believe the answer is:
tense
I believe this is a double definition.
'anxious' is the first definition.
(I've seen this in another clue)
'future maybe' is the second definition.
(future tense)
(Other definitions for tense that I've seen before include "Nervous or tight" , "past possibly" , "Taut - timely verbal indication" , "imperfect, perhaps?" , "past, say" .)