How do I solve 12 across in Express Cryptic 20260612?

Question

Accepted Answer

12 across reads "Unknown competitor is Friesian" (4,5 letters); the answer is DARK HORSE. It's a double-definition clue: two separate definitions of the same word sit side by side. No wordplay split and no indicators — both halves of the clue define the answer. The full step-by-step breakdown is on this page.

Unknown competitor is Friesian (4,5)

12A — Unknown competitor is Friesian (4,5) — DARK HORSE