Silly leading characters in Dad's Army and Fawlty Towers (4)
I believe the answer is:
daft
'silly' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for daft that I've seen before include "Idiotic" , "'Silly, foolish (4)'" , "'---- as a brush': dotty" , "Informally crazy as a brush" , "Bats!" .)