Possible Clues:

• Canopy over four-poster bed
• SAT taker
• Kind of examiner or bed canopy
• Examiner, e.g.
• One who objects loses argument in favour of one experimenting
• An examiner or a canopy
• Game maker's employee
• How trying it seems to have it all over the bed!
• One trying out; canopy over bed
• An inclusion in the copy seems to be trying to get over the bed