Inkstand.

The letters “kst” are in the word, “in” is at the beginning, with “and” at the end. I know, it’s awkwardly worded but otherwise it wouldn’t be a riddle.

Someone bowled a strike. The ten white men are the pins, the dirt road is the bowling alley (it’s not dirt, but it’s the color of dirt, and if it said a smooth wooden alley it wouldn’t be much of a riddle). Three eyes as black as night are the finger holes in the bowling ball.

1. topaz – “atop a zebra”
2. opal – “gallop, a long”
3. amethyst – “shame. Thy steed”
4. diamond – “replied, I am on direct”
5. garnet – “cougar, nettled”
6. ruby – “shrub. You”
7. coral – “rancor, alighted”
8. kyanite – “sky. An item”
9. spinel – “spine. Let”
10. agate – “saga, tentatively”

Sir Gade rode toward a castle atop a zebra at a steady gallop, a long way from home. He arrived at the gate and the keeper knelt in shame. “Thy steed must be tired.” Sir Gade replied, “I am on direct orders from the King. Let me through.” A cougar, nettled by the noise, emerged from a shrub. “You must save me!” cried the gate man. Sir Gade, eyes filled with rancor, alighted and gazed toward the sky. An item fell from his cloak as drove his sword into the cougar’s spine. “Let me pass!” cried Sir Gade. The gate keeper, stunned from his saga, tentatively opened the gate, then retrieved the fallen item.

A man with a wooden leg.

Your word.