Rough cast ashore (6)
I believe the answer is:
hoarse
'rough' is the definition.
(I've seen this before)
'cast ashore' is the wordplay.
'cast' indicates anagramming the letters (letters are dispersed or cast around).
'ashore' is an anagram of 'HOARSE'.
(Other definitions for hoarse that I've seen before include "Having a frog" , "Of voice, rough and dry" , "Gravelly" , "Of voice, sounding rough" , "Ashore (anag)" .)