We need to communicate and make it clear,

It's very clear they are redoubling their efforts.

When your intention is clear, so is the way.

If I seem unduly clear to you, you must have misunderstood what I said.

Whereas last year there was a clear popular preference for Mr Brown over Mr Blair as Prime Minister, that has now all but vanished.

If I turn out to be particularly clear, you've probably misunderstood what I've said.