Receives an order and assumes control (5,7)

I believe the answer is:

takes command

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'receives an order' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'assumes control' is the wordplay.
'assumes' becomes 'takes' ('take' can be a synonym of 'assume').
'control' becomes 'command' (command is a kind of control).
'takes'+'command'='TAKES COMMAND'

'and' is the link.

Can you help me to learn more?

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

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