It is hard to see due to the functions of the Forum, but Boondoggle posted a link to a very lengthy thread discussing the best way to clear ponds where the cause is suspended clay particles.

Questions:

Are there any aquatic creatures in your pond that stir up the sediments? For example, grass carp and other rough fish, koi, bullheads, crayfish, insect larva, and a few others not mentioned. Also non-aquatic creatures such as humans or dogs swimming, diving ducks eating, etc.

Does it get worse after rain storms and then slowly get better over the next week?

Is it seasonal and you can notice a variation over the course of the year?

Your next step is to perform a "jar test".

You need two decent-sized jars (preferably glass). Fill each jar about 80% full. Put one in a dark place (closet) and one in good indirect sunlight (like a windowsill that is NOT in full direct sun). Observe both jars for a week.

If both jars clear up in a week, then you probably have a mechanical turbidity issue. There should now be material at the bottom of your jar. Some organisms in the pond are stirring up sediment or debris to make the water murky. I could even be humans, dogs, etc. as the organisms.

If the jar in the dark clears up in a week, but the one in the light stays murky or colored, then your murky water is probably due to a phytoplankton bloom. The photosynthesizing organisms died in the dark.

If both jars stay murky for at least a week, then you probably have suspended clay particles causing the murky water, and you will need to treat the water to change the ionic balance.

The solution for each problem is different!

[Much of that "jar test" advice above is from an old post by teehjaeh57.]

Jumping WAY ahead to your current questions. Yes, the clay running into the pond before you had ground cover over your bare yard certainly could have worsened the situation if the problem is suspended clay. Is the pond significantly older than the house construction? Was the pond clear after it filled, but before the house construction? The reason I ask is that if clay from your yard is the problem, then similar clay is almost certainly in the sides of your pond.

Your current vegetation will help reduce the problem in the future if you can correctly treat your pond to get it clear.

P.S. How bad is your leak? There are many threads that discuss possible solutions to leak problems depending on the pond situation.

Come back after performing your jar tests and post the results. Also, add some more information about how your pond was constructed and details about the water source and the characteristics of the leak and you can get more help on that too.

Good luck on your future pond fixes!