Related Clues:

• 'Gonna ___ with a little help from my friends'
• One held for questioning
• Word often said twice before "again"
• Licensing prerequisite, often
• Word said twice before "again"
• Try to prove
• Cricket match
• Means of determining proficiency
• Sound check
• Word after beta or acid
• Litmus ___
• Lab act
• It's often taken in silence
• Response to 'I can't!'
• 'Give it a shot!'