Sold clandestinely and Under-the-table

Under-the-table and sold clandestinely are semantically related. In some cases you can replace phrase "Under-the-table" with "Sold clandestinely", this phrases are similar.

Under-the-table adjective - Designed and carried out secretly or confidentially.

Sold clandestinely and under-the-table are semantically related. You can use "Sold clandestinely" instead an adverb phrase "Under-the-table".