The way of all flesh? (5)
I believe the answer is:
aging
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the way of all flesh?</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for aging that I've seen before include "Maturing" , "Growing old in the US" , "Growing older" , "Getting old" , "in decline" .)