I got my first inkling of what was going on I could see that PHILBY fitted at 6 across, but I had to resort to research to learn about the codenames.

The next key moment was when I realised that all clashes were on the diagonal and I could insert CAMBRIDGE FIVE along the whole diagonal. From this I could deduce that clues with answers off the diagonal were normal.

My favourite Inquisitor of 2010 so far.

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