Possible Clues:

• Went for fresh tea at the end
• It needs water to make fresh tea
• The little creature got on with gravity
• Speaker's name
• Being 3 down, one was able to get on in physics
• Is that what went into the water?
• Get this on in the water to make a man of 21 across
• Man of the House?
• Scientist taking leg off small creature
• Eye of ___ ("Macbeth" recipe item)