Clue: Drunken blast, downright gross in Shakespeare (10)
Answer: SALT-BUTTER
Explanation: Definition: gross in Shakespeare
***(blast)** [anag: *drunken*] +** UTTER** ("downright") 
*From The Merry Wives of Windsor:*
 
*FALSTAFF:Hang him, mechanical salt-butter rogue! I will *
 *stare him out of his wits; I will awe him with my *
 *cudgel: it shall hang like a meteor o'er the *
 *cuckold's horns.