A former mayor is coming to the defence of Wellington's under-fire leader Tory Whanau.

Mayor Whanau has admitted she has a problem with alcohol- and is getting help.

Councillor Nicola Young is calling on her to resign, citing concerns about the City Council's reputation.

It comes after another incident in which Whanau is alleged to have been publicly intoxicated.

Former mayor Justin Lester says Whanau has done a great job.

"She's been a great ambassador, she's been out leading the charge and getting Wellington's name out there."

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