How many letters does the top answer for “either of two spiral-horned antelopes of the african bush” have?

The most common answer is koodoo (6 letters).

Crossword clue: either of two spiral-horned antelopes of the african bush

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

koodoo 6 letters wn-def

either of two spiral-horned antelopes of the African bush

kudu 4 letters wn-def

either of two spiral-horned antelopes of the African bush