Gist, central idea (3)
I believe the answer is:
nub
(Other definitions for nub that I've seen before include "Centre, heart" , "'Gist, central idea (3)'" , "Crux, central point" , "Point or gist" , "Gist - kernel" .)
I believe the answer is:
nub
(Other definitions for nub that I've seen before include "Centre, heart" , "'Gist, central idea (3)'" , "Crux, central point" , "Point or gist" , "Gist - kernel" .)