Big Six cryptic crossword

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Across
  1. 5. Christmas has come early for Lyin' Republican striker
  2. 6. Cheating chickens instead of peaceful doves
  3. 8. The god of translations ; Grandpa Simpson replaces fruit within a classic sandwich
  4. 9. I accuse with a note that mirrors the Emerald City
  5. 10. The smallest in the Horn pairs with spacebound athlete's third name - out loud
  6. 12. Philippic orator's namesake
  7. 13. Ford and Toyota collaborate on 5 time stopper
Down
  1. 1. Mangled Batman villain owns fine Chinese material
  2. 2. Initially, an Oxford drinking club (or pig appreciation society) is university challenged by the most famous non-disciple
  3. 3. Ancient father gets in a shout out
  4. 4. Brother to the man whose hammer was too short ; posh cheerers think they are tough
  5. 7. The first half of a French mountain has no British refreshments
  6. 11. German mountain pitches tent with the Tudor
  7. 14. Gelsenkirchen's mispronounced response to a small sandwich