Stormy endless winter wind (5)
I believe the answer is:
twine
'wind' is the definition.
(thesaurus)
'stormy endless winter' is the wordplay.
'stormy' indicates anagramming the letters.
'endless' means to remove the last letter.
'winter' with its last letter taken away is 'winte'.
'winte' anagrammed gives 'TWINE'.
(Other definitions for twine that I've seen before include "Tough string" , "wind" , "can get into knots" , "Strong thread or string" , "Stout string" .)