You couldn't think of something that might give them a lead means. (Refer to the play — Heat Lightning)

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5 + 3 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.

You couldn't think of something that might give them a lead means: (Refer to the play — Heat Lightning)

To persecute

To find a culprit

To get a clue

To find a treasure