1/ id card that allows people to buy train tickets cheaply (8) ??????R?
2/ Separate’s or breakes up (8) R?????R?
3/ Asking too little money for something (13) U?D?R?H???I??
Identity card is in the clue, Nelsonboy left it out - I found it strange too when I completed the crossword earlier, it's the YOU magazine (be printed in tomorrow in Sunday Mail)