Period of the year (6)
I believe the answer is:
season
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">period of the year</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for season that I've seen before include "Salt, maybe" , "Time of 9" , "Major division of year characterised by weather and growth" , "Add condiments to for time of year" , "eg Winter" .)