TV comedy increasingly awful, some say? Want to cut it (10)
I believe the answer is:
blackadder
'tv comedy' is the definition.
(British sitcom)
'increasingly awful some say? want to cut it' is the wordplay.
'increasingly awful some say?' becomes 'badder' (non-standard comparative form of 'bad').
'want' becomes 'lack' (synonyms).
'to cut it' is an insertion indicator (inserted letters cut into the word).
'badder' enclosing 'lack' is 'BLACKADDER'.
(Other definitions for blackadder that I've seen before include "TV show" , "Comedy hero" , "Recurrent historical character on TV" , "Cash desk" .)