Piece in job lot totally smashed (6)
I believe the answer is:
blotto
'smashed' is the definition.
('blotto' can be a synonym of 'smashed')
'piece in job lot totally' is the wordplay.
'piece' says the answer is hidden in the clue.
'BLOTTO' is hidden in the letters of 'in job lot totally'.
(Other definitions for blotto that I've seen before include "Slangily drunk - ready to bolt" , "Plastered, hammered, sloshed" , "Very drunk (informal)" , "To bolt away slangily drunk" , "Bombed" .)