Official who gives different order to steam trains! (13)

I believe the answer is:

stationmaster

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'official who gives different' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'order to steam trains' is the wordplay.
'order' is an anagram indicator.
'to'+'steam'+'trains'='tosteamtrains'
'tosteamtrains' is an anagram of 'STATIONMASTER'.

Can you help me to learn more?

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

I've seen this clue in The Irish News.

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