Possible Clues:

• Absurd action
• French shunning wild old buffoon
• What a caper to be one from the hill, I see!
• Ludicrous (and a letter bank for 17-Across)
• Bizarre at one time? Not for a number of Romans
• That class of a caper is for the insect, I see
• With that class of a caper it comes from 5 down, I see
• The class of caper a gig might perform to a very large extent
• A six foot long caper, I see
• Perhaps I can't be made to cut a caper like this