Related Clues:

• Alternative for now
• "Not happening!"
• 'Not a chance!'
• With 39-Across and 49-Across, rule broken by the three theme entries' first and last two letters
• Word seen on both sides of ''say''
• Under no circumstances
• In any manner
• Not by any means, informally
• At no time whatever
• Word heard before and after "say"
• That's more what you'd expect to be 6 across by a raven
• Not with sugar on top may it be seen
• You'd expect a bit more after this from a raven
• From a raven, one might expect this and more.
• Oh, it's in the present? Not at all!