A dog seen here and there (5)
I believe the answer is:
among
'here and there' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'a dog' is the wordplay.
'dog' becomes 'mong' (I can't justify this - if you can you should believe this answer much more).
'a'+'mong'='AMONG'
'seen' is the link.
Can you help me to learn more?
(Other definitions for among that I've seen before include "in a group" , "Surrounded by" , "No mag (anag.)" , "In the middle of, say a crowd" , "Together with" .)