Possible Clues:

• Returning star contains oxygen? That's intelligence
• It takes common sense to be lacking with you and me
• Sound judgement
• Common sense a small number employ endlessly
• Pronoun with 'sommes'
• We, "oui"?
• Advance needed, taking a return to America - it's common sense
• Common sense from which we are excluded?
• ''Entre __''
• Common sense from we French