Refusal to go North with a Yankee (3)
I believe the answer is:
nay
'refusal' is the definition.
(I've seen this before)
'go north with a yankee' is the wordplay.
'go' indicates anagramming the letters (I've seen 'went' mean this ('go' can mean move)).
'north' becomes 'n' ('N' can be a synonym of 'north').
'with' means one lot of letters go next to another.
'yankee' becomes 'y' (phonetic alphabet: alpha, bravo, charlie etc.).
'n' after 'a' is 'an'.
'an' with letters rearranged gives 'na'.
'na'+'y'='NAY'
'to' acts as a link.
(Other definitions for nay that I've seen before include "Denial" , "Indeed" , "disagreement" , "In point of fact - a parliamentary vote against" , "Negative answer" .)