Wow, I found this tricky but finally, just one clue left. Obviously everyone else breezed through it because noone else has posted.
6d Single bridge partners and German held (5)
?N?E?
I am assuming answer is 'under'. Und being German for and.
Am I right? If so, can someone explain why?
And I ask, safe in the knowledge that at least one someone can - it's as sure as predicting the sunrise!