Food trail? This little one might follow it! (7,3)
I believe the answer is:
sausage dog
'this little one might follow it' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'food trail?' is the wordplay.
'food' becomes 'sausage' (sausage is a kind of food).
'trail?' becomes 'dog' (synonyms).
'sausage'+'dog'='SAUSAGE-DOG'
Can you help me to learn more?
(Other definitions for sausage dog that I've seen before include "At a stretch, a pet" , "Dachshund (colloq.)" .)