The Collaborative International Dictionary of English v.0.48:

Crepe Suzette \Cr[^e]pe` Su*zette"\ (kr?p` s?*z[e^]t"), pl.
Crepes Suzette \Cr[^e]pes` Su*zette"\ or Crepe Suzettes
\Cr[^e]pe` Su*zettes"\ [F.] n.
   A rolled or folded crepe[3], heated in an orange-flavored
   liqueur (or in a hot orange-butter sauce and moistened with a
   liqueur) and set on fire when served.
   [PJC]

WordNet (r) 3.0 (2006):

crepe Suzette
    n 1: crepes flamed in a sweet orange-and-lemon flavored liqueur
         sauce