Harry with small animals (7)
I believe the answer is:
badgers
'animals' is the definition.
The answer is an example.
'harry with small' is the wordplay.
'harry' becomes 'badger' (both can mean to bother or harass).
'with' is a charade indicator (letters next to each other).
'small' becomes 's' (abbreviation - e.g. clothes size).
'badger'+'s'='BADGERS'
(Other definitions for badgers that I've seen before include "Burrowing mammals with strong claws" , "Pesters; black and white nocturnal animals" , "Bullies" , "Pesters like burrowing animals" .)