### Clue: Reg is involved with this trial shot (7)
### Answer: SIGHTER 
 ### Explanation: Definition: trial shot
  **Anagram of**(is involved with) [REG + THIS]. 
Answer: In archery, one of the 6 practice,trial shots allowed to each competitor in a tournament.  Last one in, as this meaning is new to me.  Nicely hidden anagram indicator/fodder.