Stops with a growl, upsetting Tess (7)
I believe the answer is:
arrests
'stops' is the definition.
('arrest' can be a synonym of 'stop')
'with a growl upsetting tess' is the wordplay.
'with' indicates putting letters inside.
'a growl' becomes 'arr' (I can't explain this - if you can you should believe this answer much more).
'upsetting' indicates anagramming the letters.
'tess' anagrammed gives 'ests'.
'arr' going within 'ests' is 'ARRESTS'.
Can you help me to learn more?
(Other definitions for arrests that I've seen before include "made by police" , "has a heart attack" , "Seizes and takes into custody" , "Stops and takes into custody" , "Apprehends" .)