Casino workers scour building around jetty (9)

I believe the answer is:

croupiers

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'casino workers' is the definition.
The definition and answer can be both people as well as being plural nouns.
Perhaps they are linked in a way I don't understand?

'scour building around jetty' is the wordplay.
'building' indicates an anagram.
'around' is an insertion indicator.
'jetty' becomes 'pier' (I've seen this in another clue).
'scour' anagrammed gives 'crous'.
'crous' placed around 'pier' is 'CROUPIERS'.

Can you help me to learn more?

I've seen this clue in The Daily Express.

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