Visual STARs

If a STAR is marked VISUAL (FUBAR VISUAL APPROACH), and shows
hand-drawn paths and landmarks instead of navaids, does that mean it's
intended specifically for VFR, or for both VFR and IFR, or what? I'm
a bit confused by it because I thought all STARs were instrument
approaches. At the same time, I've heard ATC clear commercial flights
for the XYZ VISUAL approach, which implies that as long as conditions
permit a visual approach, it's okay for IFR, even though it gives only
landmarks on the ground.

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