Irish cop ordered to arrest doctor with similar appearance (10)

'with similar appearance' is the definition.

'irish cop ordered to arrest doctor' is the wordplay.
I cannot really see how this works, but
'ordered' could be 'so' ('so' can be a synonym of 'ordered') and 'so' is located in the answer.
'doctor' could be 'mo' (medical officer) and 'mo' is located in the answer.
'irish' could be 'ir' (abbreviation) and 'ir' is found in the remaining letters.
This may be the basis of clue (or it may be nonsense).