The answers to the following clues will have something in common:

1. OK, just average
2. Bean used in cosmetics
3. Certain dog breed
4. New York State prison
5. Generic laugh
6. 60's dance craze
7. Dream world
8. Breach of etiquette, perhaps
9. Early 20th century art movement

Answers:

1. SO-SO
2. JOJOBA
3. CHOW CHOW
4. SING SING
5. HA HA
6. GO-GO
7. LA LA LAND
8. NO-NO
9. DADA

Credit: LA Times Crossword
Sylvia Bursztyn and Barry Tunick
ECHOES

NOTE: See also MURMUR WORDS