Current D&D needed me to think about the rare cases in which a specimen from this outcast race would garner both wealth and safety, and be raised out of the usual militarist traditions. For gnolls there is no such thing as "civilian clothing", but here it is, one exception that I managed to put on paper before falling again. How it could look like.

Contrary to what you'd think gnolls have picky fashion, that is, the "civilized" ones. They like bright colours and strong contrasts both in layout and form. They can't separate themselves from their trinkets that all mean something (or so they say) and do like themselves some shiny bits although unlike other races they run more after the effect than the material.

Despite only achieving this state alongside other, "civilized" races, the overall style of their fashion is commissioned to be well specific to them. Specimen of a same tribe, clan, family, group will wear similar garments, and display specific design elements such as pauldrons or scarves. The style and overall scheme of the clothing first depends on ethnicity, then the smaller differences will vary between tribes, then clan, and so on. Yet, none of this is the result of a concerted effort; it simply underlines the highly gregarious character of this race, instinctively picking an outfit as if taste was somehow ingrained in their primary instincts.

Females favour those long robe-like coats that reach close to the ground, while males often go for puffy pants. If you're an outsidee to the race, and have trouble telling males and females apart, know that this is not a perfect rule, and that gnollish genders are notoriously hard to differenciate for foreign species. In truth the only thing that works is to look for breasts, or lack thereof.

Still, always ask. Carefully.