Really enjoyed today.
1ac is a cracker! I guessed the answer - and had it confirmed by all the down answers - about 15 minutes before I worked out the parsing. And smiled when I got it.
The parsing of 13d is convoluted. I had “Ail” for “pain
L and couldn’t work out how the other letters worked around it. Inflamed rear I initially thought was either the letter “D” (last letter of inflamed) or an anagram of “rear”, both of which semi-worked in the clue. Again only after guessing and inserting the word (and checking its spelling!) did the full parsing appear.
Now I’m off to put my 13d to use! First dry Sunday in aged. Suffice to say that the wet weather has suppressed that “get fitter” New Year resolution, and as such my 13d will probably spend a lot of the ride on the left... 🙂