A run enlivened with changes taxes people (6,7)
I believe the answer is:
inland revenue
'with changes taxes people' is the definition.
I can't judge whether this definition defines the answer.
'a run enlivened' is the wordplay.
'a run enlivened' can be anagrammed to 'INLAND REVENUE'.
But, I am not clear how the anagram is indicated.
Can you help me to learn more?
(Other definitions for inland revenue that I've seen before include "Part of HMRC" , "Government tax department" , "Government department in charge of collecting direct taxes" , "Tax organisation" , "The tax people" .)