That neat, rich new four-year contract the Redskins left under George Allen's tree last July apparently contains some clauses and numbers unacceptable to the Redskin coach and general manager, The Washington Post has learned.

Despite the passing of more than three months since Redskins president Edward Bennett Williams announced that the Redskins and Allen had reached accord on a new agreement extending Allen's contract through the 1981 season, Allen has still not signed. His present contract expires in April.

Allen confirmed this yesterday, although he insisted he has "no problem" with the agreement.

But it was learned that Allen has not yet signed because he is unhappy with several points in the new contract; nor is he pleased with the way the current Redskin season has gone

Meanwhile, several members of the Redskin board of directors reportedly are unhappy with the hefty raise offered Allen, and with the way he has performed this year.

In an interview yesterday, Allen, confirmed, he has still not signed the new contract. He said, "The guy you should ask about it is Williams. As far as I know, it's all in the hands of the attorneys."

William was not available for comment yesterday.

Last July, The Post reported Allen was offered about $250,000 a year under the new terms, double the $125,000 a-year salary through the first six years of his contract.

Allen denied reports he is not happy with the package offered him by the Redskins. "There's nothing like that at all," he said. "During the season it's the last thing I want to think about. My contract is not important, beating the Philadelphia Eagles tomorrow (Sunday) is.

"There will be plenty of time to take care of that later. There is no problem. I haven't even thought about it. I have an attorney (Ed Hookstraten of Los Angeles) and he is handling everything."

Hookstraten was not available for comment yesterday.

As long as Allen does not sign the contract, he can remain open to offers from other NFL teams. And after his current pact runs out on April a, he would be free to negotiate with any other club.

Of course, it can work the other way, too. The question has to be asked whether the Redskins would offer Allen the same monetary package if the Redskins did not qualify for the play-offs.

At his July press conference Williams said, "I think George Allen deserves one of the best contracts in coaching, and he has that."

Not really. At least, not yet.