More potent (8)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
stronger
'more potent' is the definition.
('strong' can be a synonym of 'potent')
This is the entire clue.
(Other definitions for stronger that I've seen before include "Less weak" , "More robust" , "More powerful" , "Mightier, stouter" , "Having greater power" .)