Answer: clamped

AnswerCrossword Clue
CLAMPEDGot stricter, with "down"
CLAMPEDHeld in place, in a way
CLAMPEDUsed a workshop tool
clampedFasten (two things) firmly together
clampedCLAMP, to fasten with a device
clampedHold (something) tightly against or in another thing
clampedFasten (something) in place with a clamp
clampedMaintain the voltage limits of (an electrical signal) at prescribed values