Ideally you make a clamping caul for the inside of the guitar that is slotted for the braces and fits nice and tight under the bridge. You don't want to crush the braces or the inside of the guitar with clamps and it also provides equal pressure and makes for a better glue up. I would check the bracing on the inside too. Sometimes a bridge lifts up due to top distortion from loose or broken braces. Otherwise Titebond is some strong and forgiving stuff.
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