Last to suffer? (6)
I believe the answer is:
This clue is a double definition.
'last' is the first definition.
'suffer?' is the second definition.
'to' acts as a link.
(Other definitions for endure that I've seen before include "'Last, prevail (6)'" , "Persist over time" , "Put up with or withstand" , "Stand" , "Put up with, say hardship" .)