Clearance = Approbation
If I use others own material such as soundtrack or image source. However, I am going to invest my time to obtain own materials for my video or website. Furthermore, I will try to use free references.
As a preparation of contingecies, I find the music clearance.
Word reference from here http://en.wikipedia.org/wiki/Collective_rights_management
Download the form here http://www.gopixpic.com/1275/clearance-request-form-for-music-film-or-tv/http:||img*docstoccdn*com|thumb|orig|39227161*png/