Style of trousers' torches (6)
I believe the answer is:
flares
This could be a double definition.
'style of trousers'' is the first definition.
'flares' can be an answer for 'trousers'' (I have seen 'Unfashionable trousers' mean 'flares' so perhaps 'trousers' could also mean 'flares'). I'm not certain of the 'style of' bit.
'torches' is the second definition.
(I've seen this in another clue)
Can you help me to learn more?
(Other definitions for flares that I've seen before include "Wide-bottomed trousers" , "Devices producing bright lights as signal" , "Trousers with legs widening at the bottom" , "Bell-bottom trousers" , "Unfashionable trousers" .)