### Clue: Possibly a Christmas cracker to pull thus contains letters on a pencil in red, say? (8)
### Answer: WISHBONE 
 ### Explanation: Definition: Possibly a Christmas cracker to pull
 [ SO(thus;in this manner, as in "do it thus") **containing**(contains) HB(the letters on a lead pencil, signifying that the lead is medium hard) ] **contained in**(in) WINE(a type of which;say is a red).
Defn: That which resembles a Christmas cracker when pulled, ie. splits into 2 uneven parts. (I couldn't find a Christmas cracker that was called a wishbone.)