Time of the year (6)
I believe the answer is:
season
'time of the year' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for season that I've seen before include "Major division of year characterised by weather and growth" , "One of four periods" , "Add condiments to for time of year" , "spring, perhaps" , "eg.Summer" .)