contrivance

a device or control that is very useful for a particular job

the faculty of contriving; inventive skill; "his skillful contrivance of answers to every problem"

an elaborate or deceitful scheme contrived to deceive or evade; "his testimony was just a contrivance to throw us off the track"

an artificial or unnatural or obviously contrived arrangement of details or parts etc.; "the plot contained too many improbable contrivances to be believable"

any improvised arrangement for temporary use

the act of devising something