The advantage of turning up with a girl (5)

I believe the answer is:
asset
'the advantage' is the definition.
(I've seen this before)
'turning up with a girl' is the wordplay.
'turning' becomes 'a' (I am not sure about this - if you are sure you should believe this answer much more).
'up with' is a reversal indicator (move letters in down clue up).
'a girl' becomes 'tess' (girl's name).
'tess' backwards is 'sset'.
'a'+'sset'='ASSET'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for asset that I've seen before include "Useful or valuable property" , "Item of property" , "Help" , "Useful item" , "Something that's worth having" .)
