Put/set the record straight
Definition 1 of 1
Pro Tip 1/3Misconception Correction
Use it to address and correct false beliefs or errors about a situation or fact. 
The CEO needed to set the record straight about the company's financial health.
Pro Tip 2/3Clarifying Rumors
It's useful for clearing up rumors or gossip that may have spread. 
She wanted to put the record straight on the rumors about her resignation.
Pro Tip 3/3Personal Justification
Individuals often use it to justify actions or decisions that were misunderstood. 
To set the record straight, I only declined the offer because of my family commitments.