Stiff-upper-lip type (5)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stiff-upper-lip type</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 stoic that I've seen before include "One who endures hardship uncomplainingly" , "Able to endure pain" , "One patient under misfortune" , "Greek philosopher" , "Zeno, say" .)