Opposite of "fer” (4)
I believe the answer is:
agin
'opposite of fer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for agin that I've seen before include "Dialect form of against" , "Against (facetious)" , "Not in favour of" , "Opposed to local" , "Not a fan of" .)