Remember the overarching cuckoo rule is "conveying the essence of the answer" and the credo "we deal in sounds." When you have words like laser and radar that are no longer functionally acronyms, the /l/ sound in laser conveys the L that stands for light. The ubiquitous example from Clark was "FBI for investigation," where you enunciate a letter that abbreviates the clue. Using the letter conveys an abbreviated word, just as you can't say "it begins with an I." This is also why "the superhero with an S on his chest" conveys the answer for Superman.
In the above-redacted example, the essence of the answer was not conveyed, so it was acceptable. I wouldn't be surprised if there wasn't a note on the game sheet indicating it was an acceptable clue.