Mum's Birthday Cryptic

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Across
  1. 4. Warlord ignores the Queen.
  2. 6. Sweeper gobbled up reporter.
  3. 7. Sounds like "I'm alright, _!" Never 'eard of 'im.
Down
  1. 1. Plenty of space near this SW city.
  2. 2. Confused men I aced without schooling - watch it!
  3. 3. Soft, a cruise line, we hear.
  4. 5. Sign - really empty.