Possible Clues:

• Throw one's hat in the ring with rebel teen and Scarlett on the radio
• Popped in
• Admitted removing case of Lenten wine
• Logged; arrived
• Went in and registered as competitor
• Went inside hospital department before start of day
• Came into hospital department flushed on Ecstasy
• Go tin?
• Close-bound sickly tree logged
• Having got in with it, it's been posted