Originally Posted by wreckless
Okay, are we all done being mean to each other?
Great. Here's the answer to the OP's question:http://support.apple.com/kb/HT4915
Right click, choose delete, tick the "also delete this song from iCloud" box.
The problem with the above suggestion is that it will also delete the track listing within iTunes itself, along with all the metadata (playlists, playcount, last played date, etc.) You're throwing out the baby with the bathwater. Some folks will want to delete the song from the cloud, but keep the local song. And deleting from iTunes to re-add it later means you'll lose metadata.
A better way to go about this, I've found, is this:
Consider turning off iTunes Match while you do this procedure. Quit iTunes.
Hold down the OPTION key while re-launching iTunes. A dialog will appear. Create a brand new library, call it whatever you want ("iTunes TEMP" should do.) Then turn on iTunes Match for this library. It will then download the whole index of songs that have been sent to the cloud (via matching, uploading, or because you've purchased them) in this new library you've created. Then you can simply select all of these tracks, hit delete -- and it will delete these songs from iTunes Match. Your iTunes Match is now empty. Then turn off iTunes Match , and quit iTunes.
Hold down the OPTION key while launching iTunes... and this time, select your original iTunes library.
(After you've determined that all is well, you can safely delete that other "iTunes TEMP" folder.)
Note that if/when you turn iTunes Match back on, it will rescan your library and will likely upload new copies of the songs you previously matched/uploaded and then deleted from the cloud.