Travel round German capital in the saddle (5)
I believe the answer is:
ridge
'the saddle' is the definition.
(I've seen this before)
'travel round german capital' is the wordplay.
'travel' becomes 'ride' (eg to ride a bus).
'round' means one lot of letters goes inside another.
'capital' indicates taking the first letters.
The first letter of 'german' is 'g'.
'ride' going around 'g' is 'RIDGE'.
'in' is the link.
(Other definitions for ridge that I've seen before include "Feature of mountain" , "Hog's-back" , "Narrow hill-range" , "Long, narrow hilltop" , "Wrinkle" .)