Pseudonym
'pseudonym' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for nom de guerre that I've seen before include "French pseudonym" , "new name" , "Style of wartime" , "Fictitious name" , "Assumed name" .)
'pseudonym' is the definition.
(pen name is a kind of pseudonym)
This is all the clue.
(Other definitions for pen name that I've seen before include "Writer's pseudonym" , "such as Mark Twain" , "Author's alias" , "Nom de plume" , "Author's pseudonym" .)
'pseudonym' is the definition.
(nom de plume is a kind of pseudonym)
This is the entire clue.
(Other definitions for nom de plume that I've seen before include "Pen name" , "Pen-name" , "False name" , "George Sand?" , "Literary pseudonym" .)
'pseudonym' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for alias that I've seen before include "Otherwise called" , "stage name, perhaps" , "Pseudonym" , "one's assumed" , "Otherwise - an assumed name" .)
'pseudonym' is the definition.
(nom de plume is a kind of pseudonym)
This is all the clue.