Possible Clues:

• Far from clumsy
• Really good (at)
• Particularly skillful
• Like crackerjacks
• Quite slick
• One part of the company showing skill
• A small section of organisation that's very proficient
• A storehouse lacking nothing is proficient
• Very skilled/proficient
• Encourage Robert to be a murderer, by the sound of it, and he'll go rapidly downhill