All cryptic answers are numbers which are found in titles of films, books, songs, mottos etc
1: Knock above a prescribed number of times. Letters 5,5,5
2: 50s song about twins. Letters 6,4,7
3: This person never puts a foot wrong. Letters 5,3,5
4: How many ways to end a relationship. Letters 5,4,2,5,4,5
5: Often used to express likelihood. Letters 3,2,3
6: Feathered friends share the same fate. Letters 4,3,5,4,3,5
Thanks for your answers. I don’t think it’s ‘Knock Three Times’ as the clue reads Knock above a prescribed number of times! I also can’t see it being One to One… more likely Ten to One in my humble opinion