More than double the drivel written about the last poll (6)
I believe the answer is:
triple
'the last poll' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'more than double the drivel written about' is the wordplay.
'more than double' becomes 'l' (I can't justify this - if you can you should give a lot more credence to this answer).
'the drivel' becomes 'tripe' (tripe is a kind of drivel).
'written about' indicates putting letters inside.
'l' inserted into 'tripe' is 'TRIPLE'.
Can you help me to learn more?
(Other definitions for triple that I've seen before include "involving several parties" , "Increase threefold" , "Consisting of three" , "Multiply by three" , "Three times" .)