Harassed doggedly? (7)
I believe the answer is:
worried
'harassed' is the definition.
(thesaurus)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for worried that I've seen before include "Felt or caused to feel anxious or troubled" , "Was unduly anxious" , "Afraid" , "far from calm" , "Concerned, anxious, troubled" .)