Lesser Safety Valve

safety valve
The safety valve is a provision in the Sentencing Reform Act and the United States Federal Sentencing Guidelines that authorizes a sentence below the statutory minimum for certain nonviolent, non-managerial drug offenders with little or no criminal history.
A valve opening automatically to relieve excessive pressure, esp. in a boiler
A safety valve is a valve mechanism for the automatic release of a substance from a boiler, pressure vessel, or other system when the pressure or temperature exceeds preset limits. It is part of a bigger set named pressure safety valves (PSV) or pressure relief valves (PRV).
a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous level
A means of giving harmless vent to feelings of tension or stress

lesser
Lower in terms of rank or quality
a thing that is of smaller size, value, importance etc; comparative form of little: more little; of two things, the smaller in size, value, importance etc
Used in names of animals and plants that are smaller than similar kinds, e.g., lesser spotted woodpecker, lesser celandine
Not so great or important as the other or the rest
of less size or importance; "the lesser anteater"; "the lesser of two evils"
Lesser is a surname, and may refer to