Snack for stolen pet (6)
I believe the answer is:
hotdog
'snack' is the definition.
(I've seen this before)
'stolen pet' is the wordplay.
'stolen' becomes 'hot' (stolen goods are 'hot').
'pet' becomes 'dog'.
'hot'+'dog'='HOTDOG'
'for' is the link.
(Other definitions for hotdog that I've seen before include "Food served at arena" , "snack" , "junk food" .)