I presume you need a ramp pass for Dubai airport - go to the pass office in the administration building at the far end of terminal one.You will need a letter on company headed paper requesting the pass plus copies of passport last page and visa page. There is a form to fill in - nothing you would not expect. As far as police clearance is concerned ask what is required from staff in the office - been in there many times and always found them polite and helpful. When I used to go there the documents you submitted to the pass office were sent to the airport police for clearance. Hope this helps