Fast food stolen for party is great
I believe the answer is:
hot dog
'fast food' is the definition.
(I've seen this before)
'stolen for party is great' is the wordplay.
'stolen' becomes 'hot' (I've seen this before).
'for' means one lot of letters go next to another.
'party' becomes 'do' (do is a kind of party).
'is great' becomes 'g' (I can't justify this - if you can you should give a lot more credence to this answer).
'hot'+'do'+'g'='HOT DOG'
Can you help me to learn more?
(Other definitions for hot dog that I've seen before include "Sausage in breae roll" , "Fast food - panting spaniel?" , "Sausage in a roll - acrobatic skier" , "grub?" , "Sausage in a bap" .)