Please note rule 3.3: The Turn Player must allow a minimum of five minutes and one viable response before providing any additional clues. This applies through the game, right through to the final clue. There is however no requirement to advise competing players that their responses are incorrect during the interim.
Please also note rule 3.2: The Turn Player must set five clues that clearly match the station he has chosen. These clues must become progressively clearer as the game goes on, to the point that come the final clue only a select few stations are still viable options (there is no obligation to reduce the number of possibilities to just one however).