Possible Clues:

• Priests' work
• Cars put to the test in government department
• Government department such as Defence or Justice
• Small dresses wear out cloth?
• The cloth tax behind skimpy dresses
• Government office in tiny street beside railway
• Short skirts are straining the church
• Women wear them to make an effort at holy orders
• Monty Python's "The __ of Silly Walks"
• Small cars really test the clergy