Crossword Genius

Cameron briefly discussed agony of political effort (8)

Ross

I believe the answer is:

campaign

I'm a little stuck... Click here to teach me more about this clue!

'effort' is the definition.
(I know that effort can be written as campaign)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for campaign that I've seen before include "Military operation" , "battle" , "lobby" , "offensive" , "Series of planned actions to achieve a goal" .)

I've seen this clue in the Sydney Morning Herald.
Want a hint initially instead of a full solution? Install my app