It may be worn doggedly (6)
I believe the answer is:
collar
'it may be worn doggedly' is the definition.
The definition suggests a singular noun which matches the answer.
This is all the clue.
Can you help me to learn more?
(Other definitions for collar that I've seen before include "Be hot under the . . . . . . to be angry or resentful" , "Neck of shirt" , "A cloth neck-band" , "Arrest (sl.)" , "Seize; cut of bacon" .)