What does the cryptic crossword clue "Basic construction by American-Africans (5)" mean?

The wordplay uses a charade (building blocks). HUT (synonym="‘basic construction’") + US (synonym="‘American’") = HUTUS The answer is HUTUS.

Basic construction by American-Africans (5)

Guardian Cryptic #29424 | 23 Down | 2024-07-02 flower