Season some stew in terrine (6)
I believe the answer is:
winter
'season' is the definition.
(winter is a season)
'some stew in terrine' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'WINTER' is hidden in the letters of 'stew in terrine'.
(Other definitions for winter that I've seen before include "'If . . . . . . comes, can spring be far behind?'" , "Cold season" , "Cold period" , "Coldest season" , "Time for mittens and scarves?" .)