I'm the opening bidder, and I bid 3S. My rationale is that after an inverted minor suit raise, you bid stoppers up the line to try to get to a NT contract. (An inverted raise is not a game force, though; only a one-round force.)
With that in mind ...
After an inverted minor raise, the normal procedure is to cue bid stoppers, looking for a NT game. If opener didn't have clubs stopped, it would be suicidal to cue bid a major at the 3 level to try to find a NT game. Therefore, 3S must be showing ...