"The Drashigs were named so by Holmes as an indirect anagram of 'dish rag'" This is wrong. It's a perfectly normal anagram of 'dish rags'. Here's an example of an indirect anagram:-
Consider the clue Unusually tough monster (5). Here, the compiler has invoked the indirect anagram: the solver is expected first to find the synonym HARDY for "tough", and then to anagram it to give the answer HYDRA, as opposed to being given the clue Unusually hardy monster (5), in which the letters to be anagrammed are provided literatim. 22.214.171.124talk to me 10:33, August 12, 2016 (UTC)
"Vorg repairs the eradicator and turns it on the Drashigs, but not before they eat Kalik and Orum."