I've decided to go with 'touching off' as the solution to the Cryptic Clue 'feeling = touching' and 'off = below par'. But I don't think I could ever have got that solution from the Quick Clue of 'causing' since that could really only be used for causing an explosion like a fire work. Not a very good clue.
Sorry quinie, didn't see your response before I added my follow up. The Daily Mail cryptic clue was 'causing to be feeling below par' and the quick clue was 'causing'. It was eight and three letters and the pattern was "?o?c?ing ?f?". So as I've said I've gone for 'touching off'.