"OK with me" (4)
I believe the answer is:
fine
'ok with me' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for fine that I've seen before include "Sheer or excellent" , "end to the music" , "nice > brandy" , "Unclouded as the money penalty" , "No special brandy" .)