1. A small detail that is nice or polite to have but isn't necessary.
    We met the new captain while we were taking enemy fire and were unable to observe the niceties of formal introductions.
  2. Subtlety or precision of use.
    A rocket propelled grenade doesn't have the nicety of a sniper round, but you must admit its effectiveness.

The above text is a snippet from Wiktionary: nicety
and as such is available under the Creative Commons Attribution/Share-Alike License.

Need help with a clue?
Try your search in the crossword dictionary!