Crossword Genius

A run enlivened with changes taxes people (6,7)

Ross

I believe the answer is:

inland revenue

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'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" .)

I've seen this clue in The Sunday Times and The Times.
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