Upper hand
'upper hand' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for advantage that I've seen before include "Superior or more favourable position" , "Benefit, profit" , "Use" , "More favorable position" , "Benefit - superior position" .)
'upper hand' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for edge that I've seen before include "Some bordering" , "Brim" , "Hem" , "'Border, boundary, rim (4)'" , "marginal advantage" .)