To answer the question you actually asked, rather than giving advice on cutting it (and a bit rudely if I may say so - though I'm sure unintentional). It's often difficult to tell what type of grass you have. A lot of them look very similar. Looks like you have different types of grass growing in your lawn - that clump being one of the standouts maybe? It tends to happen over time. You might need to call in a lawn care specialist.
I'm assuming you were not looking for advice on cutting it, but DirtMechanic is correct. Once you have solved your issue with the type of grass - whatever that is - you really should sharpen your mower so that it cuts the blades rather than tears them and you will see a more healthy lawn. If someone else is mowing your lawn, get a different service because they are not maintaining their equipment adequately. Once or twice a season for sharpening your mower is usually fine for home use, but anyone doing it for living should probably be sharpening once a week or two at most. For home use, sharpen at the beginning of the season, then if the cut ends start to look frayed and not cut cut cleanly, do it again. And one other thing, when you sharpen your mover blades, it's easy to remove more material from one end than the other. So check they are still balanced by hanging them on a screw driver through the center hole. That will greatly reduce vibration and noise and extend the life of your mower's bearings.