In The Sims 4 Get To Work, players are able to Create an Alien straight away in Create-a-Sim. The only setback for some players is that Aliens have a very limited amount of clothing, and no option to wear any of the shoes, accessories, hats, and clothing that regular Sims can wear. There is a way around this though.
The mannequin objects added with the new expansion pack work on residential and commercial lots. This means that you can purchase one for your home lot and have both your Sims and Aliens purchase different outfits from it. Mannequins can be purchased via Buy Mode in Activities & Skills.
Once you’ve placed your mannequins, you have the option to randomize an outfit, or create one in CAS. Once you have selected an outfit for the mannequin, have an Alien of the same age group and gender purchase the outfit for §175 Simoleons. This adds the outfit to your Aliens wardrobe selection for use at any time!
This is currently the only way to unlock an unlimited selection of clothing, shoes, hats, and accessories for Aliens, but if you prefer not to spend the §350 Simoleons for a Mannequin at home, take your Aliens to a clothing store in town to purchase outfits from there.
Hat Tip: AlwaysSimmer & Adventfear