Block and close tab that’s dodgy (8)
I believe the answer is:
obstacle
'block' is the definition.
(I've seen this before)
'close tab that's dodgy' is the wordplay.
'that's dodgy' is an anagram indicator.
'close'+'tab'='closetab'
'closetab' with letters rearranged gives 'OBSTACLE'.
'and' is the link.
(Other definitions for obstacle that I've seen before include "Progress blocker" , "Barrier or deterrent" , "Blockage, hindrance" , "Thing blocking progress" , "Stab Cleo (anag) - which hinders progress" .)