Take on X (8)
I believe the answer is:
shoulder
This clue might be a double definition.
'take on' is the first definition.
(I've seen this before)
'x' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
Can you help me to learn more?
(Other definitions for shoulder that I've seen before include "Meat joint" , "Old usher, oddly, is part of the body" , "Carry a burden" , "Edible part of lamb" , "Bear (burden); joint" .)