Moped (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
sulked
'moped' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sulked that I've seen before include "Was sullen and silent" , "Became huffy" , "Moped due to resentment" , "Brooded, pouted" .)