Stiff-upper-lip type (5)
I believe the answer is:
'stiff-upper-lip type' is the definition.
(I've seen this in another clue)
This is the entire clue.
(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" .)