Never done before (13)
I believe the answer is:
unprecedented
(Other definitions for unprecedented that I've seen before include "Exceptional" , "Entirely new" , "Totally novel" , "Never before known or experienced" .)
I believe the answer is:
unprecedented
(Other definitions for unprecedented that I've seen before include "Exceptional" , "Entirely new" , "Totally novel" , "Never before known or experienced" .)