Match official's new skill backing new signing? (8)
I believe the answer is:
transfer
'new signing?' is the definition.
(footballer signed to a team after a transfer)
'match official's new skill backing' is the wordplay.
'match official's' becomes 'refs' (I can't justify this - if you can you should believe this answer much more).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'skill' becomes 'art' (both can mean a talent).
'backing' says the letters should be written backwards.
'refs'+'n'+'art'='refsnart'
'refsnart' reversed gives 'TRANSFER'.
Can you help me to learn more?
(Other definitions for transfer that I've seen before include "Move from one team to another" , "Exchange" , "Reassign" , "Bring over" , "Change to another group or surface" .)