What letter is this?

Question

The answer to this puzzle is a single letter:

⚙️♠️ ⛑➕ PN

What letter is this?

Hint 1:

This puzzle is inspired by this puzzle: A puzzle in 140 characters

Hint 2:

/ =

Answer 1

The letter is:

L. (I'm actually not quite sure, see below.)

The first twelve characters ...

... are actually two blocks of six characters, separated by a space. The emojis in the first block depict a cog, an ace, a ram, a car an oca and a gem. The emojis in the second block show eta ("estimated time of arrival", probably not a Greek letter we're looking for), first aid, a red tomato, an ear, a tie and add.

As in the referenced "puzzle in 140 characters", these can be arranged into two word squares:

         C O G           E T A
         A C E           A I D
         R A M           R E D

The football ...

... refers to the NFL. Some of the words in the square can be found in the names of NFL teams:

  • Las Vegas Raiders
  • LA Rams
  • Chicago Bears
  • Arizona Cardinals

If we highlight only the rows and columns with the words found in the teams above, we get:

         C . .           E . .
         A . .           A I D
         R A M           R . .

(Hm. I thought this should give two L's. The Redskins now call themselves the Washington Football Team, so red should probably not be highlighted, but aid is right there in Raiders. The second square could be a T, because it is not really specified what is a row and what a column, but transposing the first square doesn't give a letter.

But there's the "P (muted speaker) N" still to account for. This could mean permutation, but swapping rows or columns in a grid with one full column and one full row can lead only to L or T.)