Beer tucked into by American adult, one smashed at parties (6)
I believe the answer is:
pinata
'beer tucked into by american adult one smashed at parties' is the definition.
I can't judge whether this definition defines the answer.
'beer tucked into by american adult' is the wordplay.
'beer' becomes 'pint' (beer is typically served by the pint).
'tucked into by' indicates putting letters inside.
'american' becomes 'a' (common abbreviation - e.g. in organisation names).
'adult' becomes 'a' (abbreviation).
'pint' going around 'a' is 'pinat'.
'pinat'+'a'='PINATA'
Can you help me to learn more?
(Other definitions for pinata that I've seen before include "Smashed party guest" , "Container suspended from a height for blindfolded children to break open with sticks" , "that's broken at party" .)