cryptic 283

challenging roadie's mantra on mike t?s???s
to capture spirit of epitaph, promise to look at both sides e?????I?e
showing off at opening, upended commercial soft drink ???e*
bribery is hard work! ????? I thought it could be 'swe*at
if 'showing off etc' should be 'soda*' - the letters do not match!!
thanks