Cab driver's not very bothered about a roadblock (9)
I believe the answer is:
barricade
'roadblock' is the definition.
(synonyms)
'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.
'cab'+'driver'='cabdriver'
'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" .)