Drivel, gibberish (8)
I believe the answer is:
nonsense
This clue is a double definition.
'drivel' is the first definition.
(I know that nonsense is a type of drivel)
'gibberish' is the second definition.
(I know that gibberish can be written as nonsense)
(Other definitions for nonsense that I've seen before include "'Foolishness, silliness (8)'" , "Quick look" , "Rubbish, foolish talk" , "Rubbish, twaddle" , "one [TOMMYROT], thirteen [CODSWALLOP], or twenty [BALDERDASH]" .)