Getting on in years
I believe the answer is:
aged
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">getting on in years</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 aged that I've seen before include "Antiquated" , "not a modern copy" , "Long in the tooth" , "Grew older" , "not like a callow youth" .)