Collocations for outfit - noun

complete
new
summer, winter
designer
interview, party, wedding, etc.
clown, cowboy, etc.
revealing, sexy, skimpy
matching
The pair arrived in matching white outfits.

wear
choose, pick, pick out
buy
complete
I'm looking for a necklace to complete my outfit.

in a/the outfit
He looked very good in his new outfit.

large
small
professional
cowboy, dodgy (both BrE)
computer, publishing, etc.