Perhaps one's given order to steam trains? (13)

I believe the answer is:

stationmaster

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'perhaps one's' is the definition.
I can't tell whether this definition defines the answer.

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

'given' is the link.

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 Telegraph.

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