Possible Clues:

• I convert after dreadful act — that's not saying much
• Disinclined towards conversation
• Understood tea-brewer could be uncommunicative
• Reserved one act after another one failed
• A name curtailed in performance making one speechless
• hunter about to have one go — quiet!
• Go around a metropolis mostly tight-lipped
• Cut train in error? It's withdrawn!
• Introduction to Torn Curtain production isn't saying much
• Silent prowler on the retreat, one shot