Dan must change to a removal job (7)

I believe the answer is:

dustman

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'a removal job' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps you can see an association between them that I can't see?

'dan must change' is the wordplay.
'change' indicates an anagram.
'dan'+'must'='danmust'
'danmust' anagrammed gives 'DUSTMAN'.

'to' is the link.

Can you help me to learn more?

(Other definitions for dustman that I've seen before include "I clear what's left" , "Refuse collector" , "Rubbish collector" , "Refuse worker" , "Bin emptier" .)

I've seen this clue in the Evening Standard.

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