Framework from Princess Anne? (7)

I believe the answer is:

chassis

I'm a little stuck... Click here to teach me more about this clue!

'framework' is the definition.
(I know that chassis is a type of mounting)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for chassis that I've seen before include "Main frame (of vehicle etc)" , "Framework of motor vehicle" , "Vehicle's base frame" , "Base-frame of car" , "Car's body" .)

I've seen this clue in The Sun.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.