This is a clue from the Irish Times cryptic crossword:
Weird arachnid with venomous tail in the French cemetery
Answer: "necropolis". How was this arrived at?
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Hmm, an arachnid with venomous tail is a SCORPION, and "the" French is LE (French translation of "the"), and all that is anagrammed ("weird"), making NECROPOLIS (cemetery). This is an indirect anagram, and this is generally discouraged in cryptic clues since one unit can have many synonyms, and those synonyms most likely have more than one anagram, leading to many possible anagrams.