Quid ___ quo (3)
I believe the answer is:
pro
(Other definitions for pro that I've seen before include "In favour of; advantage" , "gets paid to play?" , "Golfer" , "Professional; advantage" , "Expert (abbr)" .)
I believe the answer is:
pro
(Other definitions for pro that I've seen before include "In favour of; advantage" , "gets paid to play?" , "Golfer" , "Professional; advantage" , "Expert (abbr)" .)