Creating a lookup list & project field lookup using a declaritive content type

Problem: Create a list that has a lookup column and a projected field from the lookup column.

Example:

• Some code I used to create a lookup column (Agency ID) in a list and a field to be brought in from the lookup list also (AgencyName)
• This should be plugged into the new list's content type (AgencyContact).
• The column being brought across also (Agency Name) needs to reference the GUID of the lookup column it relies on (Agency ID) using FieldRef.

Thanks to Paul W