Possible Clues:

• Silence
• Most of queue lines to the right of crush
• Put a stop to couple of lions heard following start of 14 across
• Stifle
• Suppress a rebellion or disorder
• Put a stop to last three letters from Basque with a couple of lines
• Allay, as fears
• Bring under control
• Calm suspicion, avoiding railway lines
• Stop, as an uprising