This needs to be done on classic table, 5 minute game mode. The Ace of Spades spinner is on the ramp up to the saloon. What you need to do is basically just practice being able to hit the spinner as well as a bit of luck. This trophy will award as soon as you go through the spinner the 11th time - you do not need to finish the level for it to count.
A couple of tips:
* You can hit it with either flipper, though it is of course easier with the right-hand flipper.
* Note that if you hit it up the ramp but not all the way to the saloon, then it will fall back which I believe will get you an extra hit.
* The kick-back pistol on the right side will launch the ball into the spinner - send the ball over there any time you can.
* Learning how to catch the ball on the right flipper will help immensely in giving you more chances to hit the target.