Crossword Genius

Having the appropriate expression when giving the order (5,4)

Ross

I believe the answer is:

right face

I'm a little stuck... Click here to teach me more about this clue!

'having' is the definition.
I know nothing about this answer so I can't judge whether this works.

'appropriate expression when giving the order' is the wordplay.
I cannot quite understand how this works, but
'appropriate' could be 'right' (similar in meaning) and 'right' is located in the answer.
'when' could be 'e' (I've seen this in other clues) and 'e' is found in the answer.
This explanation may well be incorrect...

'the' is the link.

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I've seen this clue in the Evening Standard.
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