Hm, kinda poopy picture. That's the line that feeds from the sending unit to the stainless lines. The fuel filter is father up from that, in front of the axle, left side of Jeep. Unless someones added a second filter there.... then who knows.
If you can get a clearer picture I could see more, but it looks like you have enough slack in the rubber hose to remove, cut and install with new clamp if needed.
'91 Frankenheep YJ. 4.0, 4" BDS, Richmond 8.8, Titan 12k, 35" KM2's, rust.
'88 YJ, 4.2/4.0 head, +4½" & shackles, BFG 33's (sold)