Coal dust, 4 letters
Stem of plants of the Gramineae, 4 letters
End, 9 letters
Reached a high point, 10 letters
Grass or sedge stems, 5 letters
Hollow grass stalks, 5 letters
A final climactic stage, 11 letters
The decisive moment in a novel or play, 11 letters
A concluding action, 11 letters