Heather Valentines Cryptic

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Across
  1. 2. to kill some crows (6)
  2. 5. Farewell, say they (2)
  3. 7. Hospital's street leads to toliets (2,5)
  4. 8. In a scar, old wounds of mother (5)
Down
  1. 1. wax spiller says exercise! (3)
  2. 3. cat gets lost around courage (7)
  3. 4. Bird messes up fit following south westerlies (5)
  4. 6. Ivys handshaker for a black forest gateau without the trees (5)