This is one of those trophies that the vast, vast majority of FIFA players will get just by playing the game.
However, writing that as a solution seems to piss off certain members of the community, so for those guys, here's the quick and dirty method of getting this achievement:
First, you're going to need two controllers.
From the FIFA 15 "Main Menu", use the
or
buttons to highlight the "Play" tab.
Highlight the "Kickoff" tile (usually in the top left corner) of the "Play" tab. Press the
button to enter the next menu. With the primary controller (the controller you want to get the trophy on) select one team. Select the opposite team with the second controller.
My suggestion is that you use one of the "elite" teams (Real Madrid, Barcelona, Bayern Munich, etc) for the primary controller, and pick a crappy 1/2 start team (like Englands, Football League Two, Accrington) for the secondary controller.
Keep progressing until you get to the final screen (it will have "Play Match" highlighted) - you can
or
over to the "Game Settings" and change the time and/or difficulty if you feel the need. I would suggest Amateur & 4 minute halves - but you might want to go longer if you're not confident in your ability. The Trophy is going to pop as soon as you get the 10 tackle/possession combo, so you can quit out if you don't want to finish the match.
Once the game starts get possession with your secondary controller (pass the ball with the primary controller if necessary), then switch to the primary controller, run up to player with possession, press the
to perform a slide tackle, hopefully the majority of the time you will retain possession (however, it's an EA game, so bs will happen. When you do have possession, give back possession to the secondary controller, and repeat 10 times.
I imagine (because it's EA, after all) that every tackle/possession combo won't register, so it'll take more than 10 attempts. Be persistent and the Trophy will soon be yours.
Good luck!!