Bachelor with hesitation getting left in capital (6)
I believe the answer is:
berlin
'capital' is the definition.
(capital of Germany)
'bachelor with hesitation getting left in' is the wordplay.
'bachelor' becomes 'B' (abbreviation e.g. BA=Bachelor of Arts).
'with' means one lot of letters go next to another.
'hesitation' becomes 'er' (sound made while hesitating - um, er).
'getting' means one lot of letters go next to another.
'left' becomes 'l' (common abbreviation).
'b'+'er'+'l'+'in'='BERLIN'
(Other definitions for berlin that I've seen before include "German city" , "Composer of White Christmas" , "City once divided by wall" , "Possibly Isaiah" , "Irving . . . . . . , great American song-writer" .)