Old Arrakis - 5x5 π

Cryptic Mini #000000020: "Old Arrakis" obscuration level: π (a quickie for hump day) Haven't done a 5x5 in a while, so here's a breezy lil number for you today. Cheers!
mini cryptics every other Thursday!
I don't use difficulty ratings anymore,
but here's the old system:
(clear)πππππ(opaque)