Less fresh (6)
I believe the answer is:
staler
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">less fresh</span>' is the definition.<br/ ><span class="explanation-format__explanation">('stale' can be the opposite of 'fresh' so perhaps 'staler' is reasonable for 'less fresh')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(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" .)