noun (n)

• the quality of being a slippery rascal(noun.attribute)

  Synonym:
  rascality, shiftiness, slipperiness
  

  source: wordnet30
• the quality of requiring skill or caution(noun.attribute)

  Example:
  These puzzles are famous for their trickiness.
  

  source: wordnet30
• The quality of being tricky.(noun)

  source: webster1913