Possible Clues:

• 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
• Far from clumsy
• Very skilled/proficient
• A bureau, when contracted, is proficient
• A business division contracted to be proficient
• Addle-pated fellow who ought to know better