Less fresh
I believe the answer is:
staler
'less fresh' is the definition.
('stale' can be the opposite of 'fresh' so perhaps 'staler' is reasonable for 'less fresh')
This is the entire clue.
(Other definitions for staler that I've seen before include "Less fresh, more musty" , "Alters (anag) -- less fresh" , "not so original" , "More musty or mouldy" , "Older and lacking freshness" .)