The biggest item on President Carter's public schedule today is his debut as the host of the "Ask President Carter" call-in radio show, a program that may or may not become a regular event, depending on how it goes.

White House aides said the only item on the schedule other than the 2-4 p.m. broadcast, which will be carried live on the CBS Radio Network and delayed on the Public Broadcasting Service from 5-7 p.m., is Carter's daily morning intelligence briefing.

Carter spent an hour yesterday with AFL-CIO President George Meany, and Lane Kirkland, the labor federation's secretary-treasurer, but neither the White house nor the AFL-CIO would say what was discussed.

And aide to Meany said the invitation to meet with Carter came from Vice President Mondale shortly after Meany said on Feb. 21 that his labor federation would "not cooperate" with the President's request for prior notification of proposed wage increases.

Mondale also attended the meeting.

Special emisary Clark M. Clifford, who returned Tuesday from Greece, Turkey and Cyprus, met with the President to report on his search for a new peace formula in Cyprus.

In a statement, the White House said Clifford believes "that a Cyprus settlement will be difficult," but "some first steps . . . have been made, and a settlement in 1977 is possible." Negotiations on the issue begin later this month in Vienna, Austria.

Meanwhile, the Immigration and Naturalization Service disclosed yesterday that the State Department has recommended against sending Japheth Milton Walusimbi, now in custody in New York City, back to his native Uganda.

Walusimbi, who entered the country illegally from Canada in late 1975, has asked for asylum.

White House press secretary Jody Powell, asked if Carter knew about the case in light of Uganda President Idi Amin's order last weekend temporarily banning Americans from leaving his country, said only that the Satate Department was reviewing the case.

A State Department public information aide said the case was given more than a routine review.

Walusimbi has not been granted asylum. INS officials said they are looking for another country to which to deport him.