Possible Clues:

• Type of telephone to ring southern forest-dweller
• A clown may, when between a rock and a hard place
• Standard type of phone with singular component
• Criterion, standard
• Standard against which to make an assessment
• Jester sees the point in modern type of phone
• Clown provides assayer's equipment
• Ask to borrow several pounds — clown!
• Character in As You Like It
• ___ tide