I'm so interfering, travelling as a politician? (7,8)
I believe the answer is:
foreign minister
'a politician?' is the definition.
(I've seen this before)
'i'm so interfering travelling' is the wordplay.
'travelling' indicates anagramming the letters.
'im'+'so'+'interfering'='imsointerfering'
'imsointerfering' with letters rearranged gives 'FOREIGN MINISTER'.
'as' is the link.
(Other definitions for foreign minister that I've seen before include "Angela Merkel, for instance" , "Straw was" , "churchman from Rome?" , "Powerful person in government" , "Senior politician" .)