A very long time (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">a very long time</span>' is the definition.<br/ ><span class="explanation-format__explanation">(ages can mean a very long period)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ages that I've seen before include "Indefinitely long time" , "Long periods" , "Gets older" , "Donkey's years" , "Times" .)
(Other definitions for aeon that I've seen before include "Very long and indefinite period of time" , "An immense period of time" , "Vast age" , "Eternity" , "With lots of time" .)