Possible Clues:

• E.g. toe
• Finger — toe
• Enjoy computing number
• MI5 or MI6, but not CIA, has one such piece of data
• Work on plot, one of several at hand
• On hand to turn it over
• Part of a phone number
• Enjoy that number!
• Figure getting mine owner's instruction in pit?
• It might be one way to make a trench