For low altitude to commence approach in IFR

[twinbird]

In IFR flight, upon reaching IAF with preceding trfc exsisting and can't get a descend clearance by IAF. In this case we need to hold over IAF to descend to the ALT wchich we can commence safe (not too deep) APCH.


I wonder which phrase is the appropriate one to request to ATC controller.


I use as follows, " request hold over ××(designator of IAF) to lose alttitude". I'm not a english native speaker and want to use a natural expression as possible in ATC.


Thanks in advance.