OK, I'll contribute my (whisper it) two:
1. One who is active in body or mind works under the table when burned out (7)
A famous jolan subtractive anagram - under the table minus burned to give ATHLETE
3. Stumped by a novice, caught by a lob (2,1,4)
A L (novice) in A TOSS (a lob) to give AT A LOSS for stumped