5 down: Leaving without a single medal (4) G?N? (gone or gong)
14 across: Lecturer in Chopin has no love for key element (8) L?N?H?IN (lYnchpin or linchpin)
22 down: Cattle feed mashed like oca (3-4) O?L-?A?E (oil cake, it's a guess of an anagram of like oca)
Many thanks in advance.