Clues for the word "RHAP"

We've had 3 crossword clues used for this word, and seen it 2 times in crosswords. It was last seen in Washington Post Classic crossword on July 23, 2017.

Referring Clues

Gershwin wrote one "in Blue": Abbr.
Mus. work
Irregular mus. form

Last Seen In

Washington Post Classic - July 23, 2017
LA Times - May 24, 2012