Expensive bar serving otherworldly bottles (5)
I believe the answer is:
ingot
'expensive bar' is the definition.
'ingot' can be an answer for 'bar' (thesaurus). I am unsure of the 'expensive' bit.
'serving otherworldly bottles' is the wordplay.
'bottles' indicates the answer is hidden within the clue (bottling is a kind of containing).
'INGOT' is hidden in the letters of 'serving otherworldly'.
Can you help me to learn more?
(Other definitions for ingot that I've seen before include "A lump of metal like gold" , "valuable block" , "expensive block" , "Moulded metal bar" , "Mass of precious metal" .)