Put down a cow? (5)
I believe the answer is:
lower
I believe this clue is a double definition.
'put down' is the first definition.
(I've seen this before)
'a cow?' is the second definition.
(I've seen this in other clues)
(Other definitions for lower that I've seen before include "subordinate" , "Jersey perhaps" , "Inferior - scowl" , "Cow" , "Let down; frown" .)