Girl coming up has advantage (5)
I believe the answer is:
asset
'advantage' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for asset that I've seen before include "Useful thing or person" , "Beneficial thing" , "Seats (anag.)" , "Valued item" , "Valuable possession, worth having" .)