5A - A report of playwright on the beach? (6) ???O?S
18A - Stolen ring returned in spring. (2 words 3,4) H?T ?N??
16D- Incomplete clue for party? (4-4). H???-D?N?
Hi Jono! Yes, in 5A my S should be an E. Had thought of HALF DONE for 16D but couldn't parse it so thanks. My N in the 2nd word of 18A should have been an O so I've got that as well. Finished, phew! Thanks for your help.