Look into the CL-body from behind; there is a frame at the bottom between the flag and the back element of the lens. So You can control, before putting the lens in the last position of mounting.
E.g. with that method You will find that the Super Angulon 3,4/21mm fits (!), but ONLY (!!!) in the close focus position. If focussed away, the ring of the last element touches the body frame.
B.t.w. I wished the Leica M had the same selective light metering as the good-old-CL...
Any way be cautious with the flag, if the lens is away for changing or mounting a distance ring (e.g. with using VISOFLEX 2) - it is a rare part from a camera system where production ended 21 years ago.
Have fun with the little beauty!
P.s. one reason why i did not buy the MINOLTA CLE is that the body does not accept longer back parts like in the first 1,4/35m (the bokey Ch&).