The most common and most likely answer to this crossword clue is the 7 letter word ASHCANS
I've seen this crossword clue in The Times
A
S
H
C
A
N
S
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The straight part
We know that "US dustbins" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case us dustbins = ashcans.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ASHCANS mean?
ASHCANS noun- A container for ashes, used in times past for accumulating ashes generated from wood and coal fires, for eventual disposal elsewhere. A dustbin.
- A kind of large firecracker.