Possible Clues:

• Maintain it is in this month
• Maintains that this is in 30 across, by the sound of it
• Not yield
• Refuse to take ''no'' for an answer
• Assert that one little end of 3 down may be in a tin
• It's sin … perhaps you could twist my arm!
• Take a firm stand at home and start to shave first
• Demand determinedly
• Maintain relatively little in a tin
• Beg persistently and urgently