I want to drag a clip on to the time line and have it stay were it is so I can move it about as necessary.
Consider simply placing the new clip on the next higher track. It can then be positioned as desired.
But keep in mind that higher tracks overlay lower tracks, so the new clip will obscure what's on the track just beneath it.
Once positioned, the new clip can be dragged down into the lower track.
While holding down the mouse button, slide the clip: multiple arrows will appear, to show precisely where it will insert.
Make a mistake? Press <ctrl-Z>.