Cab driver's not very bothered about a roadblock (9)
I believe the answer is:
'roadblock' is the definition.
'cab driver's not very bothered about a' is the wordplay.
'not' is a deletion indicator.
'very' becomes 'v' (abbreviation).
'bothered' is an anagram indicator.
'about' indicates putting letters inside.
'cabdriver' with 'v' removed is 'cabdrier'.
'cabdrier' with letters rearranged gives 'barricde'.
'barricde' going around 'a' is 'BARRICADE'.
(Other definitions for barricade that I've seen before include "Roadblock perhaps" , "Block progress" , "Improvised fence" , "Wall" , "Barrier, to block a street perhaps" .)