Travel round the German capital in the saddle (5)
I believe the answer is:
ridge
'the saddle' is the definition.
(I've seen this before)
'travel round the german capital' is the wordplay.
'travel' becomes 'ride' (eg to ride a bus).
'round' indicates putting letters inside.
'capital' indicates taking the first letters.
The initial letter of 'german' is 'g'.
'ride' enclosing 'g' is 'RIDGE'.
'in' is the link.
(Other definitions for ridge that I've seen before include "Raised strip between two furrows" , "back of whale" , "watershed ..." , "drum" , "Top of roof or incline" .)