Acts for someone else concerning gifts (10)
I believe the answer is:
represents
'acts for' is the definition.
(I've seen this in another clue)
'concerning gifts' is the wordplay.
'concerning' becomes 're' (both can mean on a particular topic).
'gifts' becomes 'presents' (present is a kind of gift).
're'+'presents'='REPRESENTS'
'someone else' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for represents that I've seen before include "plays" , "shows" , "Portrays" , "Stands for" .)