GA flight instructor reported a near-mid-air-collision after receiving a clearance to land.

Attributes
ACN	1492269
Time
Date	201710
Local Time Of Day	0601-1200
Place
Locale Reference	ADS.Tower
State Reference	TX
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	PA-28 Cherokee/Archer/Dakota/Pillan/Warrior
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	None
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	Initial Approach
Person 1
Function	Instructor Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 60 Flight Crew Total 17000 Flight Crew Type 200
Events
Anomaly	ATC Issue All Types Conflict NMAC Deviation - Altitude Excursion From Assigned Altitude Deviation - Procedural Clearance
Miss Distance	Horizontal 0 Vertical 100

Narrative:

After being cleared to land we began our descent from 2;500 ft MSL. The controller called us as traffic to another aircraft and asked us to maintain 2;500 ft. We leveled at 2;400 ft and began looking for traffic when I noticed him coming straight at us. I took control of the aircraft simultaneously pushing the nose over and advised tower we were descending. He abruptly told us that before beginning a descent that he needed to know. I stated it was a noise abatement maneuver as we were on a collision course.

Original NASA ASRS Text

Title: GA flight instructor reported a near-mid-air-collision after receiving a clearance to land.

Narrative: After being cleared to land we began our descent from 2;500 FT MSL. The controller called us as traffic to another aircraft and asked us to maintain 2;500 FT. We leveled at 2;400 FT and began looking for traffic when I noticed him coming straight at us. I took control of the aircraft simultaneously pushing the nose over and advised tower we were descending. He abruptly told us that before beginning a descent that he needed to know. I stated it was a noise abatement maneuver as we were on a collision course.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.