Here, perchance, may be found a clue in symbol to the family strife.
His last letter gives no clue to the track he intended to pursue.
I think I have a clue by which his address may be ascertained.
Perhaps, in that characteristic might be found a clue to the chief fault in his nature.
Nobody ever got any clue to the reason, if there was one, for this predilection of hers.