Crossword Puzzle Sharp insight

Clue: Sharp insight

Simpson who said: "Grass today is sharper than when I was a boy" (ABE with 3 letters)
Sharp rock used by early hominids? (BLADEFORERUNNER with 15 letters)
Become sharply attentive (SNAPTO with 6 letters)
Sharp knife brand (GINSU with 5 letters)
Future sharpshooter's toy (BBGUN with 5 letters)
Home of Sharp (OSAKA with 5 letters)
Sharp-edge smoother (NAILFILE with 8 letters)
Sharp cry (e.g. YELP with 4 letters)
In need of sharpening (DULL with 4 letters)
" . . . sharp as ___-edged sword" (ATWO with 4 letters)