Menial work (8)
I believe the answer is:
drudgery
'menial work' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for drudgery that I've seen before include "Grinding toil" , "Tedious toil" , "Grind" , "Menial hard work" , "Dull menial work" .)