Hal stopped with him (3)
I believe the answer is:
ted
'hal stopped with him' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'with him' is the wordplay.
'with' becomes 't' (I can't explain this - if you can you should believe this answer much more).
'him' becomes 'ed'.
't'+'ed'='TED'
Can you help me to learn more?
(Other definitions for ted that I've seen before include "Spread hay; man's name" , "Hang out to dry" , "Heath or Hughes?" , "Man's name; make hay" , "'Father . . .' is a TV comedy show" .)