Advice from drunk that's incomplete (4)
I believe the answer is:
tips
'advice' is the definition.
(I've seen this in another clue)
'drunk that's incomplete' is the wordplay.
'drunk' becomes 'tipsy' (I've seen this before).
'that's incomplete' means to remove the last letter.
'tipsy' with its final letter removed is 'TIPS'.
'from' acts as a link.
(Other definitions for tips that I've seen before include "Hints or gratuities" , "Gratuties" , "Areas for dumping waste" , "leavings in restaurant?" , "Turns over" .)