The phrase "a clue which" is correct and usable in written English.
It can be used when introducing additional information or clarification about a clue in a sentence.
Example: "The detective found a clue which led him to the suspect's hideout."
Alternatives: "a clue that" or "a clue which indicates".
[Laughs.] "I really haven't got a clue, which I quite like.
But there it was, in plain sight, a clue which suggested something else.
The only problem is that I don't have a clue which mushrooms are edible and which are not.
Here perhaps is a clue, which permits the resurrection of the economic explanation in another more sophisticated form.
The fact Sir Tim Berners-Lee favours net neutrality should be a clue which side to fight on.
But he had 158 yards to the pin and not a clue which of his irons to hit.
A common clue which indicates a failing power supply is a high-pitched whining or grinding noise from the area of the case where the power supply is housed.
Often, the clue they give him does not point him to what he's looking for but rather to something that will offer a further clue, which will get him a little closer to what he's looking for, and so on, as in a treasure hunt.
In truth, I could have been sold anything as I don't have a flipping clue which tyre is best.
Overall, the present discussion clarifies the blurry scenario concerning the origin of translation with a major clue, which shows vividly how life could "manage" to exploit potential chemical resources in nature, eventually in an efficient way over evolution.
With regard to (a), the new analysis presented in Figure 2 figure supplement 1 provides an important clue, which we now mention in the Results where the summary statistics are described: the infragranular layer contains a subset of V1 neurons, with large receptive fields, and this subpopulation has a large MCDI.
