fuel filter(n = noun.artifact) - a filter in the fuel line that screens out dirt and rust particles from the fuel;
is a kind of filter
is a part of fuel system

air filter, centrifugal filter, coffee filter, diesel fuel, filter, filter bed, filter in, filter out, filter paper, filter tip, fossil fuel, fuel, fuel cell, fuel consumption rate, fuel gauge, fuel indicator, fuel injection, fuel injection system, fuel level, fuel line, fuel oil, fuel pod, fuel system, high-pass filter, light filter, low-pass filter, nuclear fuel, oil filter, rocket fuel, water filter