Speaker’s offensive line (6)
I believe the answer is:
course
This could be a double definition.
'speaker's offensive' is the first definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'line' is the second definition.
(course is a kind of line)
Can you help me to learn more?
(Other definitions for course that I've seen before include "Mode, of action say" , "Pursue - career - run - series of lectures" , "Syllabus" , "may be instructive" , "Part of a meal (par for this?)" .)