Possible Clues:

• Foolish
• Stupid
• 'No scents, by the sound of it (7)'
• Asinine – unfunny?
• It's half-baked when the comedian doesn't get as much
• Stupid tricks taking in tons, succeeded
• That's not funny, stupid!
• Boneheaded
• Out of one's mind (maybe scared)
• 'Lacking in sense, lacking in humour (7)'