Possible Clues:

• Legendary giant among British compilers polled future leading lights?
• Very enterprising people
• Energetic achievers
• Type-A types
• Green light to get rest well organised as high-flyers
• Overachievers, and a hint to a word that can precede both words of the starred answers
• Highly enterprising people
• Grasping folk from Turkish capital that vandalised St George crosses
• Fetchingly enterprising types?
• Impatient businessmen that can't wait for deliveries?