Orange pip blown about in St Paul’s Tube? (5,4)
I believe the answer is:
organ pipe
'st paul's tube?' is the definition.
(tube from an instrument in St Paul's Cathedral)
'orange pip blown about' is the wordplay.
'blown about' indicates anagramming the letters (I've seen this in other clues).
'orange'+'pip'='orangepip'
'orangepip' is an anagram of 'ORGAN PIPE'.
'in' is the link.
(Other definitions for organ pipe that I've seen before include "Part of a large instrument" , "Part of 'stop" .)