Crossword Genius

First of items dropped by steward behind small storage containers (5,5)

Ross

I believe the answer is:

water butts

'storage containers' is the definition.
(containers for water)

'first of items dropped by steward behind small' is the wordplay.
'first of items' becomes 'i' (bst letter of 'items').
'dropped by' indicates named letters should be taken away.
'steward' becomes 'waiter' (I've seen this before).
'behind small' becomes 'butts' (I can't explain this - if you can you should give a lot more credence to this answer).
'waiter' with 'i' removed is 'water'.
'water'+'butts'='WATER-BUTTS'

I've seen this clue in The Guardian.
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