Spud for lawman? (6)
I believe the answer is:
murphy
This could be a double definition.
'spud' is the first definition.
(synonyms)
'lawman?' is the second definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'for' is the link.
(Other definitions for murphy that I've seen before include "Irish potato" , "Lawmaker" , "lawgiver?" , "Spud?" , "King Edward, for example" .)