Time for a fall (6)
I believe the answer is:
autumn
I believe this is a double definition.
'time' is the first definition.
(I have seen 'Time of harvest ' mean 'autumn' so perhaps 'time' could also mean 'autumn')
'for a fall' is the second definition.
('autumn' can be a synonym of 'fall')
(Other definitions for autumn that I've seen before include "Fall in North America" , "Subject of 11 [ODE]" , "'O wild West Wind, thou breath of . . . . . . 's being' (Shelley)" , "Season of falling leaves" , "Fall (over the pond?)" .)