Possible Clues:

• Relating to the skin's outer layer
• Originator of research into outbreak of disease affecting part of the skin
• Resistance encountered in widespread disease of the cuticle
• Maybe skinny dip English rejected, crime when swimming
• Outbreak blocked by resistance of the outer skin
• I'm pierced, with deformation of skin
• Rash covering one side of outer layer of skin
• First to recover during widespread disease of the skin
• Of skin's outer layer