Select the most appropriate one-word substitution for the given group of words. 

An ability or special skill needed to do something.

Knack

The most appropriate one-word substitution for the given group of words is knack.

• Sinecure means a position that requires little or no work but is still paid well.
• Anecdote means a short, amusing or interesting story about a real person or event.
• Knack means a natural ability or skill for doing something.
• Artist means a person who creates art, especially paintings or sculptures.