I discovered a way to change your married partners clothes in Skyrim Remastered.
You need to download a mod that enables you to have multiple followers. The mod is titled "Multiple Followers System" and it is made by UniSL. It is available on PS4 as well as other gaming platforms but make sure you follow the simple steps given to you to make sure it works.
After the mod is installed properly, you are then able to make a lot of people your followers. This includes wife/husband. After making them your follower, you can trade with them and give them new clothes.
For example, I did this with Sylgja and I was able to take away her pickaxe, and give her fine clothes.
Hopefully this helps.. I know a lot of people have tried to figure out a way on console.
Edit: After some time their clothes will revert back to what they were. All you have to do is make them your follower again, take the clothes from their inventory, and then put it back in.
I didn't find the right solution from the internet.
References:https://www.gamespot.com/forums/games-d ... 3406445/#1teaser trailer