Possible Clues:

• IRS exam
• IRS examiner
• Vid. counterpart
• Sound portion: abbr.
• Hall of a sort: abbr.
• I.R.S. employee: Abbr.
• I.R.S. agent: Abbr.
• IRS review (Abbr.)
• I.R.S. exam: Abbr.
• I.R.S. worker: Abbr.