The term FINAL PRECEDER can be solved by the crossword solution SEMI, which is a four-letter word. SEMI is an abbreviation for SEMI-trailer truck, which is a type of truck that consists of two parts: a tractor unit and one or more trailers. The tractor unit is the front part of the truck, while the trailer is the back part. The trailer is connected to the tractor unit by a fifth wheel coupling, and it is used to transport goods over long distances. The term FINAL PRECEDER is therefore referring to the tractor unit, which precedes the trailer.