Salt, say (6)
I believe the answer is:
season
'salt say' is the definition.
(salting is a kind of seasoning)
This is the entire clue.
(Other definitions for season that I've seen before include "Add taste to; part of year" , "Add flavour at a certain time of year" , "Add salt, pepper, spices etc" , "such as 'Summertime'" , "Add condiments to for time of year" .)