A clutch (5; 105) for driving a winch, the clutch (5; 105) comprising: an input shaft for connection to a motor and being operatively connected to at least one input friction plate for rotation therewith; an output shaft for driving a winch, the output shaft being coaxial with and having at least a portion radially within the input shaft, and being operatively connected to at least one output friction plate for rotation therewith, wherein the at least one input friction plate and the at least one output friction plate are in contact with each other so that torque can be transferred from the input shaft to the output shaft via the input and output friction plates (144, 132); and a pump comprising: an inlet for connection to a fluid source; an outlet in fluid communication with the input and output friction plates (144, 132); an outer rotor operatively connected to the input shaft for rotation therewith; and an inner rotor having at least a portion radially within the outer rotor, the inner rotor being operatively connected to the output shaft for rotation therewith, wherein differential rotation of the input shaft and the output shaft causes the pump to pump fluid to the input and output friction plates (144, 132); characterised in that the input shaft includes a first end located adjacent the at least one input friction plate and an opposed, open second end, the pump has at least a portion radially within the input shaft and the pump is accessible and/or removable via the second end. an input shaft for connection to a motor and being operatively connected to at least one input friction plate for rotation therewith; an output shaft for driving a winch, the output shaft being coaxial with and having at least a portion radially within the input shaft, and being operatively connected to at least one output friction plate for rotation therewith, wherein the at least one input friction plate and the at least one output friction plate are in contact with each other so that torque can be transferred from the input shaft to the output shaft via the input and output friction plates (144, 132); and a pump comprising: an inlet for connection to a fluid source; an outlet in fluid communication with the input and output friction plates (144, 132); an outer rotor operatively connected to the input shaft for rotation therewith; and an inner rotor having at least a portion radially within the outer rotor, the inner rotor being operatively connected to the output shaft for rotation therewith, wherein differential rotation of the input shaft and the output shaft causes the pump to pump fluid to the input and output friction plates (144, 132); characterised in that an inlet for connection to a fluid source; an outlet in fluid communication with the input and output friction plates (144, 132); an outer rotor operatively connected to the input shaft for rotation therewith; and an inner rotor having at least a portion radially within the outer rotor, the inner rotor being operatively connected to the output shaft for rotation therewith, wherein differential rotation of the input shaft and the output shaft causes the pump to pump fluid to the input and output friction plates (144, 132); characterised in that the input shaft includes a first end located adjacent the at least one input friction plate and an opposed, open second end, the pump has at least a portion radially within the input shaft and the pump is accessible and/or removable via the second end.