It may well be that TEA is no longer available, but I have a copy on my PC and it is useful for solving clues with conditions, such as those in the current puzzle. The logo is a beehive. On my tablet I have the Chambers app which also includes an excellent program for anagrams, filling in gaps, etc - but not so good for this weekend's offering.
But I also have a app called Crossword Solver on my Apple devices, and this is similar to TEA and probably still available. It will allow you to search for anagrams with missing letters - so if you know that five of the letters are TRUMP and there are two more, it will give you 12 possibilities including CRUMPET, THUMPER and TRIUMPH. The last is alarming.
A friend of mine will not even use the dictionary in solving Listeners. He does the numerical puzzles as well but (being a Professor of Mathematics) has disdained to own a calculator.