### Clue: Colt left you once clutching ornate saddle for horse (10)
### Answer: CLYDESDALE 
 ### Explanation: Definition: horse
 C(abbrev. for "colt", in racecards in horseracing) + L(abbrev. for "left") + YE(an archaic form of;once the plural pronoun "you") **containing**(clutching) **anagram of**(ornate) SADDLE.