Possible Clues:

• Little Mother, no less
• Nadir
• At least this makes little mother sound
• The least amount possible
• Very least possible amount
• Just a little, Mother, to make the very least of it
• 'I mean by a '- vocabulary' one in which no word can be defined in terms of the others' (Bertrand Russell)
• Lowest
• The least of smallest amount possible
• A short dress, mother, to say the least!