Possible Clues:

• Class defends sticky tape
• Recording unit reconnoitre around burrow
• Some replicas setter discovered in storage unit
• Group of actors keeping ready ahead of electronic recording
• Device with a pair of spools
• Ready to enter class bringing tape
• Tape group, finally -- just in case
• Recorder would accommodate this tortuous test case
• Social class consuming telly -- bit of outdated technology?
• Revises the test, in case it is recorded