Update: clunk in front end is resolved. It was due for state inspection, so I asked the dealer tech to roadtest it. He immediately confirmed the noise. He put it up on the alignment rack and checked/retorqued all suspension, subframe and subframe fasteners for 1/2hr labor. Pass side control arm had worked a bit loose. Noise gone and double joint (which I suspected initially) is fine.

Rookie mistake on my part I guess. An alignment rack makes access easy with the suspension preloaded. At least it's sorted and noise free.

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12 E70 3.5i xDrive
03 E46 330i ZHP
01 E53 3.0i
98 E36 323is
12 Audi A4 Quattro
79 Triumph Spitfire
73 MGB