### Clue: ft 4in girth of American (5)
### Answer: CINCH 
 ### Explanation: Definition: girth of American
 [C INCH](Roman numeral for 100 + INCH;a 100-inch girth, say, is how you would describe an 8ft 4in girth).
Defn: The American term for a girth, the strap around a horse's belly attaching the saddle. Amusing surface – Americans on the whole are known for their wide girths (not those round the horses), but 8'4″?