In the style of German base’s illumination (9)

I believe the answer is:

afterglow

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

But I can't explain it at all! Could you help me understand?

(Other definitions for afterglow that I've seen before include "fading light" , "Post-sunset radiance" , "Light once the actual source has gone" , "Remaining light" , "Light, lingering" .)

I've seen this clue in The Hindu.

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.