With a friendly nod to @jafe (who came very close), since an hour has gone by I figured it was fair game to post my own independent solution… Didn't want to be seen as sniping or piggy-backing!
This is indeed a:
As follows (double moves abridged in the diagram - read along each row; moves in square brackets can be carried out in an alternative order):
If I can resurrect this unsolved puzzle, I believe I have an answer:
At first I wondered whether the answer would be:
However, I could not come up with a way to make this work, so I'm pretty sure it's a red herring. Instead, I then noticed a different set of connections...
P + L = W
T + R = A
P + E = L
Which means that for N + L = ?, we equivalently ...