Guzzle tasty sandwiches second (8)
I believe the answer is:
demolish
'guzzle' is the definition.
'tasty sandwiches second' is the wordplay.
'tasty' becomes 'delish' (short slang form of delicious).
'sandwiches' means one lot of letters goes inside another (to sandwich is to block something in).
'second' becomes 'mo' (both are short periods of time).
'delish' going around 'mo' is 'DEMOLISH'.
(Other definitions for demolish that I've seen before include "Eat up" , "Break down" , "Destroy completely" , "Pull or tear down" , "Knock down, say a building" .)