Of past times (6)
(Other definitions for bygone that I've seen before include "Past (e.g. age)" , "Previous" , "Times past, poetically" , "Former - well in the past" , "Erstwhile" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">of past times</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for olden that I've seen before include "Out of date" , "times gone by" , "Of a former age" , "of ancient history?" , "as in time gone by" .)