With plane bombings there were usually never any "big" clues.

For some people, his address wasn't a big enough clue.

My big clue, and was I sick of it!

It was too easy to be distracted by the big, obvious clues at a crime scene.

A big clue to how lightly Congress takes the issue.

The fact that he did not find an excuse to end the conversation was a very big clue.

It was a big clue, though small compared to the price of the learning.

Some new physics may be going on and this is a big, fat clue.

I guess the converting to Christianity is a big clue there!

The big clue had been the pearl and the cobra skin.