Season porridge (4)
I believe the answer is:
time
This clue is a double definition.
'season' is the first definition.
(thesaurus)
'porridge' is the second definition.
(porridge is slang for time in prison)
(Other definitions for time that I've seen before include "Tempo; occasion" , "Hours clocked up?" , "See 15" , "Its detonation is delayed" , "Bird" .)