Related Clues:

• Evaluation
• Word at a mike check
• In repose
• Taste, for one
• Final grade factor
• One held for questioning
• Licensing prerequisite, often
• Try to prove
• Cricket match
• Took for a trial run
• Means of determining proficiency
• Challenged, or what the theme entries in this puzzle should be
• Sound check
• Word after beta or acid
• Litmus ___