Dollar put on alien container (6)
I believe the answer is:
bucket
'container' is the definition.
(bucket is a kind of container)
'dollar put on alien' is the wordplay.
'dollar' becomes 'buck' ('buck' can be a synonym of 'dollar').
'put on' is a charade indicator (letters next to each other).
'alien' becomes 'et' (extra terrestrial).
'buck'+'et'='BUCKET'
(Other definitions for bucket that I've seen before include "Scuttle" , "Kick this water container to die" , "Carrier for liquids" , "Part of waterwheel" , "Round open water container with handle" .)