Possible Clues:

• Dairy worker
• Girl with considerable pull?
• Exploit designed, we hear, for girl occupied in cowshed
• Works in 15 across and in 24 across and 24 down
• Heartless mum accepting kind help for farm worker
• Farm hand producing lower output
• Female in dairy
• Frenchmen hide one of those types with help from the farm
• Short imperial and metric units help farm worker
• When she's in action 5 dn, say, feel the squeeze!