Cryptic crossword

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Across
  1. 1. Large current makes light
  2. 3. Get on the wooden platform
  3. 4. Along the speakers shop
  4. 6. Start and middle of Easter were put last for Romeo, a runner
  5. 7. Speak and laugh in an empty court
  6. 8. Insects rightly get them
Down
  1. 2. Heavy metal and rock in space
  2. 4. Hammer has one after starting breakfast
  3. 5. Spoken word count ahead
  4. 7. Understand circular object