A one-time/first-time customer; a chance visitor to an inn or shop without an introduction from a regular.
古い茶屋では一見の客に対して礼儀を重んじることがある。
In an old teahouse, they sometimes place importance on manners toward first-time visitors.
宿は一見の客でも快く泊めてくれた。
The inn gladly let us stay even though we were first-time guests.
この店は一見の客にも分かりやすいメニュー表がある。
This shop has a menu that's easy to understand even for first-time customers.