Business review site
I believe the answer is:
yelp
'business review site' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for yelp that I've seen before include "Little dog's bark" , "Shrill short cry of dog" , "High-pitched bark" , "Squeal" , "Short sharp cry (of such as a dog)" .)