With AIR rank 614, NLUJ is impossible but RMLNLU is definitely possible.

Hello Vaishali,
According to the Notice issued on June 15, 2018 by Convenor, Core Committee, CLAT 2018 Publication of the revised score in compliance with the directions of the Hon’ble Supreme Court in the Order dated 13th June, 2018 will by done on June 16, 2018 and second alllotment list will be published on June 19, 2018. Whether you'll get a seat in NLUJ or RMNLU I am not sure, it will depend on your category, but I am very much sure that with AIR 614 you will get a seat.
Revised CLAT 2018 Calendar
RMLNLU Lucknow Cutoff 2017
I hope it helps!