I have CLEAR security membership, however I don’t have pre-TSA. Does anyone know if both is necessary to get expedited security?
Clear lets you skip the line to get your ID checked and they funnel you right into the line for regular screening (i.e., the body scanners).
TSA Pre-check is for people who've been background checked and the screening is a "lite" screening where you leave your shoes on and your laptops and 3-1-1 bags in your carry-on, and it's an old-fashioned magnetometer (metal detector).
You need both if you fly at all with any frequency.
CLEAR is a wonderful service and has saved me on numerous occasions. You go to the front of the line. That is a life saver. CLEAR is not at all US airports yet. Examples where it is terrific: NY LaGuardia, Reagan National Airport, etc. But there is no CLEAR at Houston's Intercontinental Airport (soon to be our nation's third largest city . . . )
So you also need TSA. That often has shorter faster lines. As more and more people sign up for TSA pre-check, then CLEAR becomes the way to have no line at the airport (at the participating airports).
And GLOBAL ENTRY is a must if you do any significant, frequent overseas traveling. You skip the beastly lines at US border control on the return to the USA.
I've never bothered with CLEAR, and I've only missed one flight, and it wasn't due to security.