Firstborn (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">firstborn</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 oldest that I've seen before include "Least recent" , "Most aged" , "Eldest" , "Most senior in age" , "First in time" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">firstborn</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for eldest that I've seen before include "Most advanced in age, led set (anag.)" , "Firstborn; led set (anag.)" , "Most senior of a group" , "Most senior (E, not O)" , "Most senior in age" .)