Since I took spells away from clerics to make them feel more like faith-based miracle workers, what am I going to do with cleric spells? Easy: give 'em to white magicians.
A white magician is almost exactly like a regular magic-user (same hit dice and experience requirements,) but uses the cleric spell list instead of the magic-user spell list. White magicians can't use magic daggers and suffer the same armor restrictions as magic-users (whichever way the GM implements them,) but they can use all clerical magic items and most magic-user items as well, and can create clerical magic items using the same rules as magic-users.
White magic (cleric spells) is formula-based rather than faith-based, so the usual M-U prep times and procedures apply. White magicians are dedicated to Law, but their piety has a lesser effect; they can't turn undead and only make a reaction roll if they use a reversed spell or certain big spells like Commune and Raise Dead. An Extremely Low reaction doesn't negate the spell, but the caster loses piety, becoming tainted, which acts as a reaction penalty when dealing with beings of Law that can sense evil; when the taint reaches 10, the caster becomes a black magician. Anytime a black magician attempts the "good" version of a reversible spell, a Low reaction means the reversed form is cast instead (or, in the case of Raise Dead, the corpse is raised as a zombie instead.)
White magicians also risk becoming tainted when using wand or staff magic that causes damage. They can't research any Magic-User spell or add any to their spell books except for Read Magic, which allows them to use Magic-User scrolls (with a risk of taint.)