Will be awfully salty and horrible (7)
I believe the answer is:
beastly
'horrible' is the definition.
(thesaurus)
'will be awfully salty' is the wordplay.
'will' says to put letters next to each other (I've seen this in other clues).
'awfully' indicates an anagram.
'salty' anagrammed gives 'astly'.
'be' put next to 'astly' is 'BEASTLY'.
'and' acts as a link.
(Other definitions for beastly that I've seen before include "Brutish" , "Brutal - foul" , "Bestial" , "Horrid" , "Very unpleasant" .)