Transport workers whose motion is carried by four members (6,2,6)
I believe the answer is:
beasts of burden
This might be a double definition.
'transport workers' is the first definition.
I know that 'transport' relates to this answer.
'motion is carried by four members' is the second definition.
I know that 'motion' relates to this answer.
'whose' acts as a link.
Can you help me to learn more?
(Other definitions for beasts of burden that I've seen before include "Eg, donkeys, camels, etc" , "Mules, maybe" .)