You can do it without a license (under the table) but you'd set yourself up for a huge regulatory headache down the road and you would negatively affect user adoption..

It could be as easy as giving senders a gateway or clear instructions to buy from onramps in US and withdrawing to the receiver's wallet. Then the receiver would sell it p2p in the local market with your assistance. But not scalable, high fees, and an unpleasant experience overall..