The effluent-based nature of my other tasks should provide a clue.
Times, Sunday Times
For the moment, our clinicians must provide a clue to the durability of such relationships.
Times, Sunday Times
His vocal campaigns may, some believe, provide a clue to his exclusion.
Times, Sunday Times
And it might provide a clue to his future job.
The Sun
It's a hyperbolic way of saying that we all have an accent, and that almost all accents provide a clue to the speaker's regional origins.
Times,Sunday Times