At the risk of tempting fate for next week's offering, that was a pretty easy fill for a — what I like to call — "dartboard" grid, with only 'innie' and 'outie' radials and no 'cycled' or 'jumbled' ones.
But I miss the days when the number of radials was a multiple of four, making it completely obvious for all radials which inner-ring cell belonged to it. To make the puzzle a little more difficult for myself, I was fixated on 37 sharing the same inner-ring cell as 38 rather than 36, thus not being able to find a word to fit and making me doubt the first letter of 44 ringwise. (I also kept looking at "The Ace of Hearts" and wondering what that title had to do with the puzzle!)
One little niggle. "From the east" works as a reversal indicator for an across clue; for radial 13, "From the north-west" would have been more appropriate, though not totally accurate!
[chrisremo (#42) "PDM moment"? That reminded me of the days when newsreaders used to refer to "SALT talks"!]