Therefore - Crossword Clue, Answer and Explanation

I've seen this clue in the Sydney Morning Herald, the LA Times, The Wall Street Journal, the Penny Press, the Newsday, The New York Times, The Guardian, the Universal, the King Feature Syndicate, The Star Tribune, the USA Today, the Evening Standard, The Independent, The Mirror, The Telegraph and The Times.

'therefore' is the definition. (synonyms) This is all the clue.

(Other definitions for thus that I've seen before include "In this way" , "as indicated" , "an original Christmas gift" , "It follows" , "Therefore, hence" .)

I've seen this clue in The Sun, The Wall Street Journal, the Newsday, The Irish Times, The New York Times, The Washington Post, the King Feature Syndicate, the Newsday.com, the Universal, The Independent, the LA Times, the Penny Press, The Star Tribune, the Evening Standard, the Sydney Morning Herald, The Guardian, the USA Today, The Mirror, The Times and The Telegraph.

'therefore' is the definition. (I've seen this before) This is all the clue.

(Other definitions for ergo that I've seen before include "Thus" , "Consequently" , "'Cogito, ---- sum'" , "so philosopher wrote in Latin" , "It follows" .)

I've seen this clue in The Sun, The Wall Street Journal, the Newsday, The Irish Times, The New York Times, The Washington Post, the King Feature Syndicate, the Newsday.com, the Universal, The Independent, the LA Times, the Penny Press, The Star Tribune, the Evening Standard, the Sydney Morning Herald, The Guardian, the USA Today, The Mirror, The Times and The Telegraph.

'therefore' is the definition. ('so' can mean 'consequently' or 'therefore') This is all the clue.

I've seen this clue in the King Feature Syndicate.

Therefore (5)