Architect is a good keyword and direct is a solid secondary keyword.
.direct does not have much sales data and only a handful of public 4-figure sales from 6+ years ago.
ArchitectDirect.com is taken but not in use. The hyphen plural is in use. There is one company in the UK using the name Architect Direct with arch-direct.com as their name which does not resolve. And another UK site on localarchitectsdirect.co.uk -- so there is some commercial use but maybe not enough to drive demand for a .direct domain.
Other extensions such as network, trade, and group are priced from 2-30k.
If I owned this I'd put a mid/high 4-figure price on it and be prepared to wait a while. There's probably not a ton of demand but you only need one right buyer to come along.