“约客户”用英文咋说？

约客户
call the clients for a meeting

或
make an appointment with the client

make an appointment with customers

make an appropriate time with the clientele

Make an appointment with the clients.

第二个差不多。

约客户
will be an appointment with clients

In the afternoon there will be an appointment with one of my clients.
下午我约了一个客户。

I have promised to call on a new customer.
我约好了要去见一位新客户。