a nod is as good as a wink

The phrase "a nod is as good as a wink" is an idiomatic expression that means subtle or indirect communication can be just as effective as being more explicit or direct. It suggests that a simple gesture or implied statement can convey a message with the same level of clarity as a more obvious or verbalized communication. In other words, it implies that understanding or agreement can be achieved without resorting to obvious or explicit explanations, as long as the message is understood or inferred by the receiver.