Related Clues:

• Imprecise (in thought)
• Doubtful, pawnbroker, over a radiogram at first
• Not easy to grasp, like some physics with a bit of a twist
• Indistinct in outline
• Not easy to understand
• The writer is lifting pen? It's not clear
• Uncertain, imprecise
• Dim, indistinct
• Vague, ill-defined
• Vague content of 'stacks', conveying variable amount
• Rough and very fit
• Foggy; dim in outline
• Sort of bomb with uranium going up in clouds?
• Sort of family that puts its head back in the clouds?
• Indeterminate