Cryptic crossword No 2,889

Thanks Zabe for the gentle enjoyment. This was a fun romp with my top picks being 9a, 17a, 18a, 13d, and 14d. More in reply.

In 4a I couldn't find any support for P being an abbreviation of pea. They are homophones, however, so 'reportedly' after pea would work IMO. BTW if you're not using clueclinic.com I think you would find it useful.