Stops lying, say

RISES

Think of what the sun does at dawn or how bread might change when baked.

"Stops lying" hints at the word "lies" (as in telling untruths), but the clue adds "say" to suggest it’s a homophone. Instead of "lies," you hear "rise," and adding an S makes it "rises"—meaning to get up or ascend. The wordplay relies on the sound of "lies" matching "rise," then tweaking the spelling to fit the answer.