Possible Clues:

• On the surface of it, old partner takes rental conversion
• Immortal carrying Cross inside and outside
• Always includes ten at the outside
• Outward
• Dead bird boy finds outside
• Next real drunk outside
• Immortal bearing cross on the 17-across
• Goes around house but doesn't come in
• Like some examiners — relentless, penning symbol to show error
• Sussex tern always welcomed from abroad