Distress signal; skirt feature (5)
I believe the answer is:
flare
I believe this clue is a double definition.
'distress signal' is the first definition.
(I've seen this in another clue)
'skirt feature' is the second definition.
(I've seen this in another clue)
(Other definitions for flare that I've seen before include "Burn with sudden brightness" , "Warning light" , "signalling light" , "Widen out like a bell" , "Burst into sudden activity or anger" .)