Decide (7)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
resolve
'decide' is the definition.
(I know that resolve is a more specific form of decide)
This is all the clue.
(Other definitions for resolve that I've seen before include "Determine with conviction" , "Fix" , "work out" , "Decide; firm determination" , "bottle" .)