Start on time as arranged by transport official (13)

I believe the answer is:

stationmaster

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'transport official' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see an association between them that I don't see?

'start on time as arranged' is the wordplay.
'arranged' indicates an anagram.
'start'+'on'+'time'+'as'='startontimeas'
'startontimeas' anagrammed gives 'STATIONMASTER'.

'by' acts as a link.

Can you help me to learn more?

(Other definitions for stationmaster that I've seen before include "Railway employee" , "Railway official" .)

I've seen this clue in The Globe and Mail.

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