Perhaps vessel at the riverside will take some empty containers (6,4)
I believe the answer is:
bottle bank
'perhaps vessel' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'at the riverside will take some empty containers' is the wordplay.
'at' becomes 'botte' (I can't explain this - if you can you should give a lot more credence to this answer).
'the riverside' becomes 'bank' (I've seen this in another clue).
'will take' means one lot of letters goes inside another.
'some' indicates the central letters.
'empty containers' becomes 'off-load' (I've seen this in another clue).
The middle of 'offload' is 'l'.
'botte'+'bank'='bottebank'
'bottebank' going around 'l' is 'BOTTLE BANK'.
Can you help me to learn more?
(Other definitions for bottle bank that I've seen before include "Where to recycle glass" , "Depository for glass" , "Glass recycling store" , "Possibly dead men saved here" , "smashing location" .)