Possible Clues:

• South American writer regularly sets up tension
• Foremost of story writers introduced to employ tension
• American quiet in feeling anticipation
• State of anxious excitement
• County mostly welcomes pound with anxiety
• Opinion about American President's initial apprehension
• State of nervous or excited tension or uncertainty
• Faculty admits advertising tool provides doubt
• Mystery writers kept in employment after start of series
• Excited or anxious uncertainty