Poured out barrel containing whiskey (6)
I believe the answer is:
spewed
'poured' is the definition.
Although both the answer and definition are past participle verbs, I cannot understand how they can define each other.
'barrel containing whiskey' is the wordplay.
'barrel' becomes 'speed' (I can't explain this - if you can you should give a lot more credence to this answer).
'containing' is an insertion indicator.
'whiskey' becomes 'W' (phonetic alphabet: alpha, bravo, charlie etc.).
'speed' enclosing 'w' is 'SPEWED'.
'out' acts as a link.
Can you help me to learn more?
(Other definitions for spewed that I've seen before include "Threw out" , "Vomited or cast out in stream" , "Vomited forth" , "was sick" .)