Answer: lubricated

AnswerCrossword Clue
LUBRICATEDTight as a tick
lubricatedMake (a process) run smoothly
lubricatedLUBRICATE, to make smooth or slippery
lubricatedMake (something) slippery or smooth by applying an oily substance
lubricatedMake someone convivial, esp. with alcohol
lubricatedApply a substance such as oil or grease to (an engine or component) to minimize friction and allow smooth movement