
1) Radio terminology
Found on
https://www.crosswordclues.com/clue/aircheck

In the radio industry, an aircheck is generally a demonstration recording, often intended to show off the talent of an announcer or programmer to a prospective employer, but mainly intended for legal archiving purposes. A scoped (short for `telescoped` - by analogy with pressing the ends of a hand-held telescope to reduce its size) aircheck usua.....
Found on
http://en.wikipedia.org/wiki/Aircheck
No exact match found.