The enchanted creature can still be untapped in other ways. Claustrophobia will remain attached, and the creature will continue to not untap during its controller's untap step.
22-06-2015
wotc
Claustrophobia can target and enchant a tapped or untapped creature.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.