Picked up dessert with herb topping, one due to go off later?
I believe the answer is:
time bomb
'picked up dessert with herb topping' is the definition.
I can't judge whether this defines the answer.
'one due to go off later?' is the wordplay.
I cannot really understand how this works, but
'one' could be 'me' (a setter might use 'one' to humourously mean 'me') and 'me' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for time bomb that I've seen before include "Device set to explode later" , "Thing set to explode" , "One ticking down to explosion" , "one should go off to order" , "It'll be a blast in due course" .)