pseudonym crossword clue

 The most common answer for a pseudonym crossword clue is 5 letters: ALIAS.

Here are some other possible answers for a pseudonym crossword clue, depending on the length of the answer blank:

6 letters: ANONYM, PENNAME

7 letters: ALLONYM, NOM DE plume

8 letters: PSEUDONYM

9 letters: FALSENAME

10 letters: NOM DE GUERRE

11 letters: ASSUMED NAME

The specific answer that is correct will depend on the context of the clue and the other words in the puzzle. For example, if the clue is "a false name used by an author," then the answer could be "PSEUDONYM."

I hope this helps!