Even curtseyed before a dignitary — one’s lost a member (7)
I believe the answer is:
amputee
But I can't explain it at all! Could you help me understand?
(Other definitions for amputee that I've seen before include "Possible Paralympian" , "One who has limb surgically removed" , "One who has lost a limb" , "man with frostbitten toes, once?" , "One who's had a limb removed in surgery" .)