Subdued by a cowboy? (5)
I believe the answer is:
cowed
'subdued' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for cowed that I've seen before include "Subdued in bovine way?" , "Overawed" , "Browbeaten" , "Intimidated, subdued" , "Subdued, kept under" .)