Ears? Ears are going to become noteworthy features of this grid (7)
I believe the answer is:
corners
'ears?' is the definition.
Although both the answer and definition are plural nouns, I don't understand how they can define each other.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for corners that I've seen before include "Where lines meet or intersect" , "Points where two lines meet" , "Where lines meet to form angles" , "Places where sides meet" , "Nooks" .)