Possible Clues:

• Yes, that's the way the sound of 35 across was sent
• Nod of the head, say
• Okay
• Nod of the head, for one
• O.K.
• Yes, that's how it left us
• The way it left here on the way up, by the sound of it
• Just say yes
• Agree to a rise, we're told
• 'Yes, that's the way it left here (6)'