Come clean on brexit johnson challenges labour leader corbyn
I think there may be some confusion here!
The phrase "Come clean on Brexit" is not a direct quote from a specific speech or statement made by Boris Johnson, the former Prime Minister of the United Kingdom, to Jeremy Corbyn, the former Leader of the Opposition.
However, it's possible that you're referring to a situation where Boris Johnson, as Prime Minister, challenged Jeremy Corbyn, as Leader of the Opposition, to clarify his stance on Brexit.
In October 2019, during a debate in the House of Commons, Boris Johnson accused Jeremy Corbyn of being unclear about his position on Brexit, saying that Corbyn was "refusing to come clean" about his plans for the UK's departure from the European Union. Johnson claimed that Corbyn was trying to "obfuscate" and "dodge" the issue, and that he needed to be more transparent about his intentions.
Corbyn, on the other hand, argued that Johnson was trying to "distract" from the government's own failures on Brexit, and that he was committed to working with other parties to find a solution that would benefit the country.
So, while there wasn't a specific phrase "Come clean on Brexit" used in a direct quote, the context of the debate suggests that Johnson was challenging Corbyn to clarify his stance on Brexit, and Corbyn was accusing Johnson of trying to avoid accountability for the government's handling of the issue.