Light way to dress (6)

I believe the answer is:

strobe

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 strobe that I've seen before include "Rapidly flashing lighting often used on stage" , "Light that seems to spin" , "Flashing, very bright beam" , "Sorbet (anag) -flashing light" , "Flashing disco light" .)

I've seen this clue in The Mirror.

Want a hint initially instead of a full solution? Install my app