Humpty's big finish?, 8 letters
Non-dancer at the dance, 10 letters
Nonmixer at a mixer, 10 letters
Party animal's antithesis, 10 letters
Shy girl at a dance, 10 letters
Shy nondancer at a dance, 10 letters
Shy one at a dance, 10 letters
Shy person at a social event, 10 letters
Remains on sidelines at social event, 10 letters
Sometimes placed in genus Erysimum, 10 letters