Possible Clues:

• 9 across gets a mixture of gin to make mokes make music
• Reckoning that mokes get musical with 19 across
• What the mokes do when they get to Bray?
• Reckoning how this makes melodious mokes
• Reckon that's what they do when they get to Bray
• The way to reckon how musical the silly ones can be
• Rating, for taxation say