Crossword Genius

So send up my silly aliases (10)

Ross

I believe the answer is:

pseudonyms

'aliases' is the definition.
(pseudonym is a kind of alias)

'so send up my silly' is the wordplay.
'silly' is an anagram indicator.
'so'+'send'+'up'+'my'='sosendupmy'
'sosendupmy' is an anagram of 'PSEUDONYMS'.

I've seen this clue in The Everyman puzzle in The Observer.
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