Keen rep in trouble is one who may take orders (9)

I believe the answer is:

innkeeper

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'one who may take orders' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'keen rep in trouble' is the wordplay.
'trouble' is an anagram indicator.
'keen'+'rep'+'in'='keenrepin'
'keenrepin' with letters rearranged gives 'INNKEEPER'.

'is' acts as a link.

Can you help me to learn more?

(Other definitions for innkeeper that I've seen before include "Job" , "local manager" , "Publican" , "Tavern owner" , "Pub runner" .)

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

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