Possible Clues:

• Given anaesthetic, perhaps Georgia reportedly conveyed restraint
• Subject to update from bank? That’s putting it mildly
• Meiosis or litotes
• Turned out to cover people on condition it avoids stress
• A somewhat restrained comment below formal declaration
• The downplaying of something
• Where witness should sign? That's putting it mildly
• Litotes for instance
• Sign here? It's no exaggeration
• 'This isn't the half of it', muttered St Anne in labour