Trousers with wide bottoms (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
flares
(Other definitions for flares that I've seen before include "Trousers with legs widening at the bottom" , "Devices producing bright lights as signal" , "Wide-bottomed trousers" , "Sudden brief bursts of bright light" , "Unfashionable trousers" .)