Drunks' language is filled with vernacular (5)
I believe the answer is:
slang
'vernacular' is the definition.
(I know that vernacular can be written as slang)
'drunks' language is filled' is the wordplay.
'SLANG' is hidden in amongst the letters.
But, I'm unsure how the hidden word is indicated.
'with' acts as a link.
Can you help me to learn more?
(Other definitions for slang that I've seen before include "Vernacular" , "... to scold" , "Informal language used by a set of people" , "Patois" , "Vulgar parlance" .)