Command given to setter perhaps? (4)
I believe the answer is:
heel
'command' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for heel that I've seen before include "Untrustworthy person" , "Shoe part - come here, Fido!" , "despicable person" , "secure ball" , "Slang scoundrel or rear of foot" .)