Sir Arthur missing a new and an old ball? (7)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

CON{an} D{o}YLE (Sir Arthur) [missing a + n (new) and an o (old)]. Collins: the rounded projection on the articulating end of a bone, such as the ball portion of a ball-and-socket joint. The lesser-spotted ‘condyle’ has never been seen in these parts before or since its one appearance in a Club Monthly 10 years ago.