### Clue: Match injury unsettled, about to become terminally gangrenous (9)
### Answer: HARMONISE 
 ### Explanation: Definition: Match
 HARM(injury;damage) + "on ice"(unsettled;pending) **with** "c"(abbrev. for "circa";about, when used with dates) **replaced by**(to become …) **the last letter of**(terminally) "gangrenous ".