The legislature began consideration today of a Senate resolution urging Congress to support a nuclear weapons freeze.

At a hearing before the Senate Constitutional and Public Law Committee, Sen. James Clark Jr. (D-Howard), sponsor of the resolution, said the measure was a small step toward "making a world that is a little safer to live in. It's really not a very safe place today. The first step is to stop making these weapons . . . have a freeze and then you can go on from there and have reductions."

The resolution, being cosponsored by 11 senators, calls on Congress to pass a resolution urging President Reagan to negotiate with the Soviet Union for a freeze in testing and deployment of nuclear weapons.

Clark said at the hearing that he had received a call from someone, whom he did not name, accusing him of introducing a measure that "comes out of Moscow." But, Clark said, "I can assure you what comes out of Moscow does not affect me and I haven't gotten the word (there). But I have gotten the word from my conscience . . . this is the number one problem facing the nation and the world."

Opponents of the resolution said a nuclear freeze would weaken the United States and strengthen the Soviet Union.