Related Clues:

• Source of information, perhaps: one rejected by Brecht’s collaborator
• We had it all from the border's spring
• Thoroughly shaft
• Proficiently
• Words of commendation by no means rare
• Bore; extremely
• Where the penny might drop?
• Healthy; extremely
• We are going to water-hole
• My water is found here
• Very; without difficulty; bore
• Pit with a bucket
• Satisfactorily robust
• Deftly
• 'Actually ... '