If you have small development teams inside your enterprise and if you combine them straight with the end users practicing the User Driven Development techniques, you can call it a Lean Startup inside your enterprise company.
The developers will have to have the authority to build what they think is the best fit for the software, with no defined hierarchy inside the team, they will need to be as close as possible to the production environment, users will have to like and use the software while is being produced and the product owner is the one that will keep the vision and make sure the team is on track.
REAL WORD EXAMPLE
In this Nordstrom video, you will be able to see all these characteristics bellow being implemented at the same time:
Developers + Users
Well Defined Vision
Minimum Viable Product