Drivelling drudgery? (7)
I believe the answer is:
slavery
'drudgery?' is the definition.
(I've seen this in another clue)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for slavery that I've seen before include "Extreme drudgery" , "Bondage" , "State of subjugation" .)