the episode is The Fugitives

I think you're thinking of clover instead of Alex

Are you sure you saw Alex wearing this cowgirl outfit in the episode?

that was clover?

Yeah, remember? Clover was the one wearing cowboy outfits to impress a cute Texas student at her school

Unless Alex wore a cowgirl outfit in that episode too

Are you sure you saw Alex wearing a cowgirl outfit in that episode?

no you're right it was clover