10a. They can be found in private files (7) R?N?E?? (though not sure about first letter) 19a. Leading dog owners don't (7) ??N?A?? 5 d. People in the train (7) R?T?N?? (thinking RETINUE here?) 14a. Frozen like eels, by the sound of it (5) ???I? (last letter of 5 down is 2nd letter here)