Thanks as always Jolan. My suggestions-
1) THRASH - Defeat ...TH(e)(short) RASH
2) FEET OF CLAY - Faults not at first apparent...FEET (supports) OF CLAY (Muhammad Ali's real name was Cassius Marcellus Clay
3) NOTICED - Marked ..NOT ICED (an unfinished cake)
4) THE RATHER - All the more...Hidden in clue