Al sat with him, the dog! (3)
I believe the answer is:
ian
'al sat with him the dog' is the definition.
The definition suggests a singular noun which matches the answer.
This is the entire clue.
Can you help me to learn more?
(Other definitions for ian that I've seen before include "Albert Beale's first name in EastEnders" , "Sir - McKellen, actor" , "- - Wallace (baritone)" , "Scottish man's name" , "- Fleming (James Bond)" .)