Run fails to open after boycott of comic role (10)
I believe the answer is:
blackadder
'comic role' is the definition.
I know nothing about this answer so I can't tell whether this works.
'run fails to open after boycott' is the wordplay.
'run' becomes 'ladder' (both can mean a rip in tights).
'fails to open' means to remove the first letter.
'after' means one lot of letters go next to another.
'boycott' becomes 'black' (black list).
'ladder' with its first letter removed is 'adder'.
'adder' put after 'black' is 'BLACKADDER'.
'of' is the link.
Can you help me to learn more?
(Other definitions for blackadder that I've seen before include "TV show" , "Recurrent historical character on TV" , "Comedy hero" , "Cash desk" .)