Clutch slips

Hello everyone. I drive an MK7 of 95 with 1.4L. The car belongs to me only for 1 month, got it from the dealer, previous owners are unknown. The car has almost 180TKM down. My problem looks like this: if I give off some powerful gas, the engine turns up but the car doesn’t turn faster. This happens in all corridors. Normally the acceleration (of the car) occurs delayed, I say “it slips after”. But often I have to take away gas first, so that the power comes back to the wheel. Ultimately it looks like I can only speed up slowly, because otherwise the power of the engine is lost somewhere on the way to the wheel. I am not exactly savvy about car technology, but my guess would be first of all that it is on the clutch. Here I have to say, however, that it seems to attack properly in the 1st course. But is probably only due to the favorable lever. My request to all experts: Please help me! Thanks in advance.