### Clue: Spare tyre going down, not at first being inflated (9)
### Answer: TUMESCENT 
 ### Explanation: Definition: inflated
 TUM(short for tummy;stomach, which could be covered by a layer of fat;a spare tyre in slang) + "descent"(the act of going down) **minus its 1st letter**(not at first).
Defn: Swollen.