The Collaborative International Dictionary of English v.0.48:

Surcrew \Sur"crew`\, n. [From F. surcro[^i]t increase, or
   surcr[^u], p. p. of surcro[^i]tre to overgrow.]
   Increase; addition; surplus. [Obs.] --Sir H. Wotton.
   [1913 Webster]