A legs broken in storms (5)
I believe the answer is:
gales
'storms' is the definition.
(I've seen this in another clue)
'a legs broken in' is the wordplay.
'broken' indicates an anagram.
'in' means one lot of letters goes inside another.
'legs' anagrammed gives 'gles'.
'a' going inside 'gles' is 'GALES'.
(Other definitions for gales that I've seen before include "Force 7 to 10 winds" , "Tempests and squalls" , "High winds" , "Strong winds" , "They're force 7 to 10 on the Beaufort scale" .)