If a transcription factor will repress transcription when it is made, what is the name of a molecule that allosterically binds the repressor to block its activity?

Alosteria or allosterism is a way of regulating enzymes whereby the binding of a molecule at one location (allosteric site) modifies the binding conditions of another molecule, at another location (catalytic site) of the enzyme, distant from the first. This concept was proposed by Jacques L. Monod, Jeffries Wyman and Jean-Pierre Changeux in a series of articles, the most important of which was published in 1965 in the Journal of Molecular Biology. In biochemistry, it is the regulation of an enzyme or other protein by binding an effector molecule at the allosteric site of the protein (another site that is not the active site of the protein). The effectors that increase the activity of the enzyme are called allosteric activators and those that decrease said activity are called allosteric inhibitors.