Father of Methuselah (5)
I believe the answer is:
enoch
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">father of methuselah</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 enoch that I've seen before include "Man in Bible" , "greatly honoured" , "Biblical character" , "-- Powell, former politician" , "Cain's eldest son - Methuselah's father" .)