Final answer:
The literary device that a writer would most likely employ to raise the stakes and give the reader a clue about how the story will end is foreshadowing.
Step-by-step explanation:
The literary device that a writer would most likely employ to raise the stakes and give the reader a clue about how the story will end is foreshadowing. Foreshadowing is when the author hints or suggests what will happen later in the story. This helps to create suspense and anticipation for the reader.
For example, in the opening lines of William Shakespeare's play Macbeth, the three witches say, "Fair is foul, and foul is fair." This creates a sense of foreboding and hints that something deceptive and sinister will happen in the story.
Keywords: literary device, raise the stakes, clue, foreshadowing, suspense, anticipation