As Winter observed the relation of the spear to the statute itself, he realized there was a small opening in the base that looked like it matched. Should Clara follow his suggestion, the tip of the spear would slide ever so perfectly into the opening, like a key entering a lock. A twist and a turn and POP the side of the statue fell off to reveal an opening that contained a smaller spear that appeared to match the statue sitting on the display.
The room has a fountain, a pile of rubble, some pots, the pillars, the statues, and the center display. Feel free to describe investigating any of these locations for clues. Remember: When in doubt, roll some dice!