Thanks Rocky for pointing out P is an anagram. I spent ages trying to work out the anagram as one word until I suddenly noticed I should be looking for three words and the penny dropped. Doh!
I've made up an answer for the T, but I can't parse it at all, though I might just have worked out the Turner.
I still can't make a word out for the S. I suspect the definition is a beastly poseur, but can't get the first word.
Like you Rocky, my way in to the grid was from the B and the I, which gave me the O and the R. It was quite a hard jigsaw to do, but in the end was logical. Filling in the jigsaw when I've got half the answers does help me find the others.
So far my FOI was I and my LOI will be S should I ever get it. Lots of words I didn't know and lots of parsing I didn't get. I'm too tired to have a favourite.
Gardening tomorrow - weather and back willing.