### Clue: They're behind star turn by royal horseman outside (10)
### Answer: STRAGGLERS 
 ### Explanation: Definition: They're behind
  Anagram(*turn*) of *STAR* +(*by*) {GG(gee-gee,a *horse*) LES(name for a *man*)} around(*outside*) R(*$$r$$oyal*).  Tricky parsing, because of the "horse"/"man" and the "royal"/"horseman" conjunction in the clue.