Pieceword

With the help of the Across clues only, can you fit the pieces into their correct positions in the grid?

ACROSS 1 Of an optical instrument, not adjusted 2 Forearm bone 3 Hopelessness 4 Leopard‑like animal 5 Giant American tree 6 Noticed 7 Most bizarre 8 Female inheritor 9 Administer 10 Whole number as opposed to a fraction 11 Person who sells tickets illegally 12 To the utmost point