Tilt and extract remains of drink (7)
I believe the answer is:
heeltap
'remains of drink' is the definition.
(term for the remains of a drink)
'tilt and extract' is the wordplay.
'tilt' becomes 'heel' (I've seen this in another clue).
'and' says to put letters next to each other.
'extract' becomes 'tap' (I can't explain this - if you can you should believe this answer much more).
'heel'+'tap'='HEELTAP'
Can you help me to learn more?
(Other definitions for heeltap that I've seen before include "Remains of drink in glass" , "Last drop in glass" , "Drop left in glass" , "Shoe-layer material; dregs in glass" , "little left to drink" .)