Possible Clues:

• Stuff Mother to start this
• Stuff that, Mother, and ail in the end (8)
• Relevant evidence finally introduced in Massachusetts case
• Stuff in the middle of 14 across is fairly similar
• Stuff of substantial import
• Type of evidence directly related to the matter
• Tailor’s supply
• Evidence directly related to the matter
• China form perhaps turned bodily
• Pertinent to the discussion