Piece of cake — choose to cut both ends off (6)

I believe the answer is:

picnic

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

'piece of cake' is the definition.
(both can mean something easy)

I don't understand the rest of the clue.

(Other definitions for picnic that I've seen before include "Take a meal outside" , "external courses?" , "something easy to do" , "Meal eaten outside" , "Alfresco repast" .)

I've seen this clue in The Times.

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.